Letter of the Day: Wooden Pusher aircraft

Builders:

The letter below comes from Art Blake.  It is referencing a comment that I made in the story: Steel tube fuselages, “Safe” planes and 250mph accidents. Art has obviously extensively studied the Corvair option, and after his letter, I will clarify my point on Wooden pusher aircraft. I print the letter here because Art sent it in as a public comment, and I think his enthusiasm for building comes right through. Words many of us can relate to.

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“Dear Mr. Wynne,
I am totally psyched. I have not been this excited since my youngest son was born.
The kids are settling into happy lives and are contributing to the Common Good. My wife is comfortably situated, and last fall I made up my mind- it is time for me to break these surly bonds, build an actual aircraft, and FLY !!
I have the requisite experience: tree houses, go kart, R/C planes, and I even set the timing on my old Chevy Vega, using a light !
After much agonizing and searching and consideration, I decided on my plane, and I decided to power it with a rebuild Corvair engine. Last week for my birthday, I got my Corvair motor and my plans are on the way. I’m 1/2 way through ‘Stick and Rudder, joined EAA, and have studied lots of the building techniques tapes. The plans for my Pride and Joy are on their way! I can’t wait to get started……

And now, now, I read that you would not fly in a wood frame aircraft with a pusher engine.

I’m flummoxed, astounded, flabbergasted, crushed.
I’m speechless, horrified, bothered and bewildered.

The craft I chose, and am so psyched to build and fly, is a Volmer V-J 22, “Sportsman” – yes, A WOOD FRAME AIRCRAFT WITH A PUSHER ENGINE !.
From your blogs, I have learned that you are not someone to give a gratuitous ‘pat on the head’ to someone who is about to so something you can not condone, but, can you throw me a bone, man?
Will I be building a deathtrap? Do I have to decide between (1) building The Flaming Comet as planned, or (2) riveting together a Belite, strapping on a 1/2 VW, and flying whining circles around the airstrip, like some angry hornet, until either the motor falls off, or I fly it into the trees, just to break the monotony?
I suspect you do not say things lightly, and I need to know – is this list of ‘safety preferences’ based on actual statistics, or is it a private opinion, a Gestalt, or the result of some bad experience(s) for you?
Help me out, I dyin’ here.
-Art Blake”

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Art,

I thought your letter was very funny, you are a good writer. When I wrote the comment about wooden pushers, I was specifically thinking of a Rutan Vari-Viggen, (which incidentally, actually flew with a Corvair for one builder in the 1980s) I admire Rutan, but not for that design.  You are quite correct that some opinions are formed from negative experience rather than pure statistics. At the very bottom is an excerpt of something I wrote about a disturbing day.

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Although the stall speed of a Vari-Viggen is listed as 48 mph, compare all the specifications on it’s Wikipedia page to those of a Van’s RV-4, another O-320 powered two seat plane. Although not perfect, the RV-4 probably has a much better statistical record than the 20 vari-viggens that flew. I have experienced friends who have built and flown Rutan designs (Arnold Holmes) and friends who chose not to (Dan Weseman).  I consider both of them very good at risk management, but they use their planes differently also.

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My comments don’t directly apply to the VJ-22, and I will tell you that I have many times considered building one. The low landing speed mitigates a lot of the wooden construction issues, but I would still put a plastic tank in it or a fuel cell, and I would carefully consider what type of terrain I overflew at low altitude. I do this with all aircraft, but my factors would be adjusted with a VJ-22.  Of course, it would be a very low risk in an engine out if you were over water. As the story stated, it is all about making your own decisions.

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The Corvair/VJ-22 combination has been done before. Below is a picture from our website of a plane built by Claude Delebruere, of Newport, Vermont. He flew it about 100 hours on a Corvair, and later went to a bigger engine. The link below the plane leads to other photos and a description. You can find obscure stuff like this on our main website by using the search box at the bottom of the main page:

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http://www.flycorvair.com/delabruere.html.

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Below, an excerpt from our risk management story: Risk Management, Wrong airframe, Wrong experience level. I am writing about a Sunday morning at an SAA fly-in in Champaign-Urbana Ill. The pilot who wisely stopped anyone from calling the man’s wife was our friend Doc Mosher. I was going to ask him how, in the chaos of the moment, he kept a clear line of thought like that, but later reflected that after 20,000 hours and five decades of flying, this was not the first accident Doc had seen.

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“If anyone wants to write me debating that pusher aircraft with composite or wood fuselages are not good test planes, please read the Vari-Viggen/O-320 accident report below first. I was on hand for the crash 10 years ago. I had spent the previous day admiring the man’s craftsmanship and personal style. He was a stand out in a group of 1,000 people at Frasca. The soy bean field he had a forced landing in was big and flat enough that I am pretty sure I could have landed at DC-3 in it. His fuselage did not protect him. It had poured rain the day before and it was later thought he had water in the fuel. With many planes this would have been an non-accident, but the man’s airframe choice did not work for him on that day. His wife had driven there and previously left for a 6 hour trip home. Some one was going to call her, but a pilot with 50+ years of experience stopped them so the woman could get all the way home and back to family before finding out she was a widow.”

http://www.ntsb.gov/aviationquery/brief2.aspx?ev_id=20020617X00903&ntsbno=CHI02LA166&akey=1

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Thought for the day: Finishing planes

Builders:

I wrote the comments below in response to a guy saying that he was glad to see any homebuilt get done, and that even if the plane wasn’t very good and didn’t fly much it was still a victory to him. He made this comment about a plane that was for sale on Barnstormers with 2 hours on it. Read on, you will find out why I think differently

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To finish a plane, it is a requirement that a builder not listen to all the people who tell him he will fail or is doing it wrong. In a 6 year build, this might mean ignoring several hundred people, running from guys in your EAA chapter, your brother in law, people on line, the airport expert and a parade of others. Most of these people will simply be playing the role of ‘Eeyore’ the pessimistic donkey, (polite term for a negative Jackass) but understand that many others will be posing as ‘friendly advisors’, trying to ‘help.’ If you ignore every person you come in contact with, keep working, and the plane will get done.

Is this the definition of successful homebuilding? I say it isn’t. Completing the plane isn’t success, learning is. A guy who listens to no one learns nothing and often creates the poor flying hangar queen. His completed plane might be a rarity, but the mindset of not being willing to consider anything that might evolve one’s views is quite common today.

My definition of success is the guy who finishes the plane, ignores the 98% of the people who are negative, but learns from 4 or 5 trusted advisors who get him to consider things that make his plane far better than it would have been. This guy not only has a good flying plane, has learned a lot, he also has trusted friends and is in a position to share something. The actual rarity in society is not the bullheaded man who will not stop, it is the man wise enough to listen, examine evidence, and change his perspective if it improves what he is making.

The biggest difference between a poor plane for sale on barnstormers with 2 hours on it and a great one sitting at Brodhead with 500 hours on the tach is mostly in the mindset of the builder. Both planes are made of roughly the same quantity of wood, metal and fabric, and the likely took about the same effort to build. The difference is mostly in what the builder was willing to learn.

The barnstormer plane, and the dozens like it that were never completed are not a good use of materials nor human time. They are not art either. They are monuments to people who refuse to learn, something common enough in everyday life to need no commemoration.-ww.

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To read a story about a plane that changed the builders life and has flown more than 500 hours click on this link:

Randy Bush’s Pietenpol hits 500 hours.

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Above, Randy’s aircraft at Brodhead

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Video of Grandson’s first flight, 3,000cc Cleanex:

Builders:

Dale Williams of SC sent in this link of his Grandson’s first flight:

http://www.youtube.com/watch?v=ho2uh1cZwmY

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It is a particularly good video, not of the plane, but capturing the day. If you are working in your shop this weekend and wondering if finishing your plane will be a milestone event in your life, look no further than this film and picture having this kind of day with someone in your own family.  Catch the credits at the end to learn who covered the soundtrack.

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Dale sent these words with the link:

“One of the great joys I had recently was that of taking my seven year old grandson for his first ride in my Corvair powered Sonex. I’ve desired to do this for a number of years but waiting for him to be old enough, and me working to build and learn skills that I didn’t yet possess was all part of the process… Besides the satisfaction that comes to us personally from going where the timid fear to tread, there is the part of giving to others in the manner which you have demonstrated by your work, and also the giving to others by sharing what we have achieved, that brings us a greater fulfillment of purpose, – Dale, N 319WF”

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Above,The Cleanex of Dale Williams taxis out at Corvair College #27.

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 For more details on Dale’s plane, click on this link:

New 3,000 cc Cleanex, Dale Williams, SC

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New 601XL, 2,700 Corvair, Ken Pavlou CT.

Builders:

Zenith 601XL builder Ken Pavlou, the man who has done the online registration for most of our colleges, hosted Corvair College #14 and even set up this blog for me, has flown his plane for the first time.

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Ken in 2009, introductions at Corvair College #14

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Get a look at the film of the planes first flight at this link:

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http://www.youtube.com/watch?v=nK01KhG2CkE&feature=youtu.be

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Ken is a very unique individual. When I first starting working with Corvairs, I suspected that they might be an avenue to meeting many varied and interesting people. This has proven to be true, but I must confess, I did not foresee meeting a guy like Ken…. I reality I didn’t even know a character like him was walking around on this planet.

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People who know Ken understand exactly what I mean, he doesn’t remind you of anyone else you have ever met, he is one of a kind. People who have not met him think his friends are kidding when we point out that he is a RN, a very skilled pilot, happily married father of two, State ballroom dancing champion of Connecticut, an immigrant to the us who arrived without being able to speak a word of English, he has a savagely irreverent sense of humor, and now he can throw ‘successful airplane builder’ in for good measure.

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Ken flies a lot, and now with his own plane, we are certain to see him at a great number of events with the plane every year. Hats off to Ken Pavlou, the latest ‘Zen-vair’ pilot.

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For photos of Ken over the years, get a look at the sequence at the bottom of this link:

48 Hours until Corvair College #29 Cutoff.

-ww.

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200 Stories of aircraft building

Builders:

Below are 200 stories on aircraft building that I wrote in the last 2.5 years. This is just the top 40% most popular ones from our blog. They are loosely grouped, but you can scan through the titles, and you can read the full story by clicking on any colored title.

There are some real classics like “Unicorns vs Ponies”, but most stories are directly about flying planes and running engines. You don’t have to read it in one sitting (it is about 250,000 words, half the length of “War and Peace“) But keep it handy for a reference page. -ww.

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Building:

Basic Corvair information

Shop perspective: Mastery or ?

Concerned about your potential?

A visit to the insane asylum

Glider flying – a funny story

The Cherry Grove Trophy

Model T of the air?

Model T of the air, Part #2 – Leeon Davis notes

More Thoughts On Economical Aircraft

Testing and Data Collection reference page

Why Not the Panther engine?

What is a core engine worth?

Corvair College reference page

Corvair College History….in photos

College Tech

Basic Corvair College Skills, examples of learning

Zenvair’ Information board formed

Calling All “Zenvair” Flyers……601 / 650 / 750

New Numbering System, Final, please print.

College engine build options for closing the case

Getting Started in 2013, part #1, Crankshaft process options.

Getting Started in 2013, Part #2, Group numbering system

Getting Started in 2013, Part #3, The Camshaft Group (1100)

Getting Started in 2013, Part #4, Case Group (1200)

Getting Started in 2013, Part #5, ‘Allan Able’ short block.

Getting Started in 2013, Part #6, ‘Bob Baker’ short block

Getting Started in 2013, Part #7, ‘Chas. Charlie’ Short Block

Getting Started in 2013, Part #8, ‘Davie Dog’ Short Block

Getting Started in 2013, Part #9, ‘Eddie Easy’ short block.

Getting Started in 2013, Part #10, Piston and Cylinder options.

Getting started in 2013, Part #11, Comment of the day

Getting Started in 2013, Part #12, Piston Choices

Getting Started in 2013, Part #13, Basic piston/rod/cylinder combo.

Getting Started in 2013, Part #14, 2,850 cc piston/rod/cyl. Kits

Getting Started in 2013, Part #15, 2,775cc, (imaginary piston)

Getting Started in 2013, Part #16, 3,000 cc Piston/cylinder kits

Getting Started in 2013, Part #17, Short block cost chart.

Getting Started in 2013, Part #18, A look ahead

Getting Started in 2013, Part #19, Cylinder Heads

Guest Writer: Pietenpol builder/flyer Kevin Purtee

Guest Editorial, Arnold Holmes On Affordable Aircraft…

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Planes:

Planes flying on Corvair Power

Corvair planes and projects on You Tube

Corvair Powered Davis DA-2, w/EFI

List of Corvair Powered Zeniths

Zenith 750 / Corvair reference page, October 2013

Zenith 601/650 – Corvair reference page November 2013

Corvair power for Panther and Sonex reference page

Pietenpol review in pictures, 15 more Corvair powered Piets

16 Flying Corvair powered Zenith 601/ 650s

Corvair – Pietenpol Reference page

Gary Burdett, 2,850cc Zenith 750, now flying. (engine selection)

New 3,000 cc Cleanex, Dale Williams, SC

Panther Roll out.

Zenith 701- Corvair reference page, November 2013

New Photos of JAG-2, a Corvair powered twin.

JAG-2, Corvair Powered Twin, Jim Tomaszewski, N.Y.

Zenith 601XL-3100cc Dr. Andy Elliott

Zenith 601XL-2,850cc, Woody Harris

Zenith 650-2700cc Dave Gardea

2,700cc-Skycoupe-2002 Photos

New “Zenvair-750″, Jeff Cochran, 2,850cc engine, N750ZV

Flying Zenith 750 w/3000cc Corvair, Doug Stevenson, California

Corvair powered Dragonfly, Charlie Johnson, aka ‘One Sky Dog’

Zenith 750 Flying on Corvair Power, Gary Burdett, Illinois

KR-2S at 700 Hours – Joe Horton

New Zenith 601 XL(B), Conventional Gear, Jerry Baak, S.C.

New Pietenpol, 2700 Corvair, Don Harper SC

New Pietenpol, Gary Boothe, Cool, Calif.

Two More Flying Planes: Merlin and VP-2

Corvair Powered Merlin Flying Over Newfoundland

Floats on Snow, Corvair powered Merlin

Flying 2,850cc Cleanex, Clarence Dunkerley

New Pietenpol, EAA #1279, French Valley CA

New Pietenpol #3, Mike Groah, Tulare, California

Guest writer: Phil Maxson, flying a 3100cc Corvair in his 601XL

Another new “Zenvair” 601XLB, Jim Ballew, 2700cc

Flying Zenith 750, Tom Siminski, 2700cc, PA.

Flying 2700 cc Zenith 601 XL(B), Alan Uhr

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Engines

Complete Engines for Sale

2012 Corvair Engines For Sale: 100, 110 and 120 HP

World’s Strongest 3,000cc Corvair, built by Greg Crouchley

Panther Prototype Engine 3,000 cc/120 hp to OSH

3,000 vs 3,100 cc Corvair engines

3,000cc/Billet Crank Shortblock, Destination: Waiex

High Volume Oil Pump

3,000cc Engine Running

3,000cc Case Modifications.

Billet Cranks Made In The USA

Chinese Crankshafts

Chinese Crankshafts for Corvairs, update 2/17/13.

Notes on Corvair flight engine oils.

Shipman Engine at CC#22

A Tale of Two Spark Plugs……

The Panther’s engine, worlds strongest Corvair flight engine.

Panther Engine Is Alive … ALIVE

Engine Operations reference page

The case of the Murphy Rebel, “eyeball vs. testing”

Corvair vs O-200…. weight comparison

Testing Head Studs

Balancer Installation

Gold Oil Filter Housing, Standard and Reverse

Front and Rear alternators, their part in numbering system

Thoughts on cold weather operation, minimum oil temps, etc.

Cooling with J-3 style cowls. (Pietenpols, Cubs, Biplanes, etc)

Spark Plug Installation

Starting procedures on Corvairs, 2,000 words of experience.

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Systems:

Stromberg Carbs

Carb applications, choices people make

Fuel Injected Corvairs

Carburetor Reference page

A question of Carb location…..

Mechanical Fuel Injection Testing

Stainless Steel Exhaust Systems

Fuel Injection – Corvair flight engines reference page

New die spring landing gear on a Pietenpol, 10 a.m.-4 p.m.

Pietenpol Products, Motor mounts, Gear and Instalation Components.

MA3-spa carb pictures, Wagabond notes.

In Search Of … The Economical Carburetor

Pietenpol Box Spar Construction, 6/27/13

Pietenpol Mount on airframe

Panther Engine propeller test

Kitfox Model IV with Corvair mount

Corvair Motor Mount for Bearhawk LSA

Inexpensive Panel……..part one.

Inexpensive panel…….part two.

“William, you ignorant troglodyte”…….(instrument options)

My favorite Tach; Stewart Warner 82636.

Ammeters Pro and Con, & Flying like there is no tomorrow.

Corvair Oil System, information on oil pressure gauges.

MGL vs Corvair ignition issue

Measuring Cylinder Head Temps on Corvairs.

Corvair Cooling

Corvair Cooling, Three 2007 examples from our hangar.

Cylinder Head Temperature measurement

Cowling Inlet Area, marketing, accident stats, Darwin where are you?

Corvair Cooling, something of a human issue…..

CHT part #5, flight data from Zenith 750

Engine Cooling Factory Sheet Metal

Pietenpol Fuel lines and Cabanes

Three Pietenpol Motor Mounts

Zenith 601/650 Motor mounts, P/N 4201(A)

Intakes and Internet myths

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Communications:

Welcome to The FlyCorvair.net Blog

Back from the road, notes on Communications

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Philosophy:

Unicorns vs Ponies.

Sunday, a long day at the airport.

Fixing America is going to cost each of us $1.69

Greatest Book on Flying Ever Written, (Is your life worth $16?)

A thought on Easter….

In defense of plain speaking……

Turtles and Cell Phones, 6/24/13.

2,500 words about levels of aircraft finsh……

Steel tube fuselages, “Safe” planes and 250mph accidents

Cessna’s Chinese adventure a failure.

Communist Chinese government at Oshkosh

Risk Management, Experience vs Judgement.

Risk Management, Wrong airframe, Wrong experience level.

Effective Risk Management – 2,903 words

Risk Management, Factor #1, Judgement.

“If only someone had told him……”

Expert Witnesses in civil Aviation trials.

Great tales from discussion groups…….part #1

Vern’s Aero-Cars

Fun with Agkistrodon Piscivorus and Vern’s Aero-Trike

Cloudn’t have happened to a nicer guy……

Built by William Wynne? Built according to The Manual?

Risk Management, Judgement Error, money in the wrong place.

Flathead Ford, 71 cid. Freedom to pursue happiness.

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History and aviators:

B.H. Pietenpol, Patron Saint of Homebuilding

Robert Hedrix, Aviator, Nha Trang, 1975

The Quote, 1927, C.A.L.

James Stockdale – Philosophy

Sterling Hayden – Philosophy

A Father’s Day Story – Lance Sijan

Three Aviation Stories

Charles Poland Jr., An American of whom you could be proud.

Carl Sagan, Corvair Owner, Practical Philosopher, Individual.

William Edward Wynne Sr. – Father’s Day Notes

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Events:

Corvair College #22, March 9-11, 2012 in Austin, Texas

Panther Prototype Engine 3,000 cc/120 hp to OSH

John Moyle, noted aviation enthusiast, passes -1/16/13

Corvair College #25, In Photos

Corvair College #23 – 2850cc Engine, Roger Grable, CH-750 Builder

House Call on Pat Green’s 1,000 Hour Pietenpol

Brodhead, Oshkosh and Beyond 2013

Wisconsin 2012 Air Adventure

Zenith 750 Builder Blaine Schwartz

Corvair College #23, 2700cc Engine, Spencer Gould, SP-500

Sun N Fun 2012

Randy Bush’s Pietenpol hits 500 hours.

Corvair College #27 run on film

Franklin Engine Runs at CC ##22 KGTU Spring Break 2012

 

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Headed to Corvair College #29 the 27th -31st

Builders,

We will be out of the shop from the 27th to the 31st for Corvair College #29 in Leesburg FL. We have been prepping long hours for the event. Of great assistance in this has been 601XL builder and flyer Lynn Dingfelder from Cory PA. He has been working in the shop with Vern and I all week. Over the years he has done this several times since 2006. He blends right in with us, and helps out a lot. He manufactured a pile of case stands and hub stands for engines to eliminate builders from waiting at futures Colleges for these specialty tools to be available. The tripled the number of engines we can have in the stands at any one stage. This will have a positive effect on builders at colleges for many, many years to come. Lynn is an extraordinary guy, but the spirit of doing something to assist builders who will follow you is very strong in the Corvair movement.

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Lynn Dingfelder’s  601 XL at CC#25 in Florida, 2013. “Lynn had previously flown the plane to CC #20 in Michigan. After the College, Lynn took a short tour of southern Florida and then headed to SnF, where his aircraft was on display at the Zenith booth all week. Lynn is very mechanically inclined, and he has very good judgment, but he is relatively new to flying. He got his sport pilot license four years ago and has slowly and carefully accumulated a few hundred hours, gradually expanding his personal flight envelope. His experience and path is an excellent model for anyone new to homebuilding and flying. “

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Above from 2013: the Zenith booth at Sun n Fun. Lynn Dingfelder’s  601XLB with 2,700cc Corvair. The engine has a Weseman bearing and is fed with an Elison EFS-3A.  The installation is right out of our parts catalog. The Plane was the 25th ^01/Corvair to fly. Today there are more than 70 of them.

2012, Lynn Dingfelder’s 601XL(B) at the Zenith open house in Mexico MO.

Blast from the past, from our website 2010, Corvair College #20 coverage: “The pilots of Corvair College #20, from left to right: Lynn Dingfelder, Joe Horton, Mark Langford, and Dr. Gary Ray.”

Blast from the past, from our web page in 2008: “Above, the 25th Corvair powered 601 to fly was built by our friend Lynn Dingfelder from Corry, Penn. Lynn’s plane features an engine he crafted himself utilizing our Conversion parts. The engine was cowled and installed using virtually every component available from our Catalog. Lynn is a very friendly guy who has been to our hangar as well as a number of airshows. We look forward to seeing him fly into many of the same events at 2009. Hats off to Lynn Dingfelder for proving yet again that persistence pays. “

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Pietenpol Weight and Balance article source

Builders,

I spoke with Doc Mosher last week. As all of you Piet and Grega builders know, Doc and his wife Dee Just finished a six year run at producing the Brodhead Pietenpol Newsletter. It was an outstanding effort that brought back the whole community spirit around Pietenpol building and flying.

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Doc is not a guy to blow his own horn, but I have known him for long enough that he will forgive me if I do it for him. We all understand that newsletters are often covered by the guy in the club who has free time, is good with word processing, and let me put this politely, doesn’t have the strongest of flying nor building backgrounds. It often produces a newsletter with good graphics, but very weak technical and editorial content. Although well intentioned, many editors don’t have a lot of broad based flight experience.

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I hold that the last 6 years of the BPN is the ‘gold standard’ of the history of the publication, and newsletters in general, because Doc is the antithesis of the typical newsletter writer.  Lets start here: He has the ultimately rare distinction of holding both of the FAA’s highest awards, The Master Pilot rating and the Charles Taylor Award.  Get this: just to apply for these, you have to be an active, accident free pilot for 50 years, and for the Taylor award you have to be a working A&P for 50 years. (I just figured out that I can’t even get my application in until 2041!) Doc is a very modest guy and I knew him for several years before I discovered he had the Charles Taylor award. He used to politely listen to me, letting me believe I had something to teach him about engines.

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I used to think that you could measure writers and editors by their written content. Doc taught me by example that you also have to consider what the really good choose not to include. This judgment only comes with a depth of knowledge of the subject and a insightful understanding of people and their actions. If you have been around Pietenpols for 5 years this might not grab you, but if you have been around a long time, Doc’s judgment and choices are easily appreciated.

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I have been fortunate to know people with encyclopedic knowledge of the history of aviation, but when you listen to Doc speak of  Dee Howard, Ed Swearingen and Schweizer brothers, he isn’t speaking of historical figures, he is speaking of friends. His first hand experience through some of the most interesting periods in flight is captivating. He is a very keen observer of the human condition. His stories are always seen through the eyes of humanist who sought out the good in people, forgiving their frailties if they were real characters.

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Conversational topics with Doc are unpredictable; he might comment on being James Brown’s corporate pilot, having Thelonious Monk as a neighbor or Hunter S. Thompson as a regular in the bar Doc owned. Or he is just as likely to spend the evening speaking about a plane that is the creation of a builder he just met today. Memories are cared for but not worshipped, what can be done next always a better topic that what has passed.

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In a previous story: Pietenpol Weight and Balance project I covered a description of doing the 5 part series on Weight and Balance on Ford, Continental and Corvair powered Pietenpols.  It was a project I had thought about doing for a long time,  but I would like to be publicly clear that it is my immense respect of Doc and the quality of the newsletter that he and Dee were producing that motivated me to do the work and make a lasting contribution that might measure up to his standards. Few builders know it, but Doc has painstakingly collected and carefully authenticated an incredible collection of original plans data on Pietenpols. It is called “the Packet” and it fills a 2.5″ thick 3 ring binder.  I wanted to produce something that might add a few pages to this historical record.

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Doc did not amass this information to occupy a dusty shelf in the EAA’s reference library. He put it together to be a useful tool to today’s builder; to make the next generation of Pietenpols  a little better than the last. To make the specific Weight and Balance data articles accessible to builders, Doc has offered them in a single package to builders. If you would like a set, stick a $5 in an envelope and mail it to Doc’s address below. If you wish to make it a little easier, send $12 and perhaps he can send it to you in a flat rate priority mail envelope.

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While your at it, you can include a thank you note to Doc and Dee for their years of work on the newsletter. They don’t need the praise, but you will feel better about yourself knowing you expressed gratitude for being the beneficiary of an excellent newsletter.

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Doc and Dee Mosher

1071 Meadow Lane

Neenah, WI 54956-3936

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Blast from the past, summer of 2000: Doc (in the beard) and I in my hangar at spruce Creek for Corvair college #1.

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To read a little more about Doc’s background in aviation, get a look at this story Ed Leinweber wrote about Doc last year:

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http://www.midwestflyer.com/?p=6720

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Pietenpol Weight and Balance project

Builders,

Besides covering the world of Corvairs, I have done a number of additional projects in Experimental Aviation. One of the most important of these other projects was the Pietenpol Weight and Balance project, 2010 -2012. We did this project to serve all builders of this design, not just the builders using a Corvair. The work was covered in a series of five articles in the Pietenpol newsletter. There is information at the bottom of this story on ordering the back issues.

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Above, My Pietenpol at the last hours of Sun n Fun 1996. From L to R, Gus Warren, Steve Upson and a much younger version of me. I have been around Pietenpols my entire 25 years in aviation. Take a moment to look at all the aspects of this on our Pietenpol page at this link:

Corvair – Pietenpol Reference page

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The nature of the issue: People who know the design well, understood that a great number of these planes were being finished and flown near their aft CG limit or behind it. This is a dangerous situation. The problem was driven by a number of factors: people using light engines like A-65’s, pilots who are far past the 170lb FAA example, and the fact many people had no examples to follow, and operated on old wives tails. The Aircamper is extraordinarily sensitive to poor planning because the pilot sits entirely behind the rear spar of the wing, much further aft than a typical tandem cockpit light plane such as a J-3.

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Additionally, many planes were built with their main landing gear too far back. This lead to several airplanes being put on their backs. Combining axle placement from 1930s drawings with modern brakes caused this.

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Although there had not been any fatalities directly attributable to CG and axle placement, there had been significant preventable damage done. I also suspected that the poor utilization of a great number of finished planes was due to the undesirable handling caused by these issues.

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A weight and balance document that Bernard Pietenpol developed in the 1960’s with an example of showing correct axle placement for brakes, an example of W&B that allowed a 290 pound pilot to be in limits, and stating in all capital letters that the CG of his design was 15″ to 20″ and that it was never to be flown aft of this, was available, but largely ignored by builders. Additionally, I weighed “The Last Original, ” Bernard’s personal plane, confirming his design data. I can think of no other design where builders routinely ignored designers CG limits. Our goal was to demonstrate that there is no reason to.

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The project was done with the support of many well known Pietenpol people like Doc and Dee Mosher and Bill Knight. We also had great participation for pilots who allowed us measure their aircraft and weigh them. The project had broad support.  A gentleman who was personal friends with BHP told me that it was the single most constructive project undertaken since Bernard had passed in 1984.

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The data collection: In 2010,2011 and 2012, I brought a set of very accurate electronic scales to Brodhead and weighed more than 30 different Pietenpols with Corvair Ford and Continental  engines. All of the measurements of the aircraft, such as fuselage length, motor mount length, landing gear location and wing to fuselage location were accurately taken. I used the same set of scales every year. A number of the aircraft we weighed had very poor bathroom Scale type W&B reports. Several planes had not been weighed in years, or were purchased second hand and had W&B data that was clearly copied from a different aircraft. About 1/3 of the aircraft had flown to Brodhead at or beyond the designs 20″ aft CG limit. All of these pilots expressed thanks at learning the situation and made plans to correct it.

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The data showed many parts of builders lore to be foolish myths; Both long and short fuselage models were shown to be equally prone to CG issues;  Fuel and passenger weight was shown to have little effect; we proved that building a longer engine mount had very little effect on CG compared to wing placement; Lighter was not better, as the lightest planes as a group had the most aft CG.

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We did additional measurements on planes in 2011 and 2012. I used the same scales in Florida and South Carolina to measure several other planes. The total data set is now 33 aircraft, enough to cover the design thoroughly. For an example of a specific CG change and performance change in a Pietenpol going from a 65Hp engine to a Corvair read: Pietenpol Power: 100 hp Corvair vs 65 hp Lycoming.

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Bob Lester strikes the “Intrepid Aviator” pose with his Pietenpol.  Bob weighs 210 fully dressed up for open cockpit flying. with his Lycoming, his plane was flying near the back of the CG range at 19.1″. With the Corvair we moved it forward to 15.9″ This is a dramatic shift, and it would now take a pilot over 320 pounds to move his CG to the aft limit. This is a much better position to be in.

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The project was started at Brodhead 2010. With the help of the above crew,  we performed a weight and balance on 14 Piets. From left to right above, Ryan Mueller, Jess (whose shirt says “Real men fly  Pietenpols”), Emory Luth and myself.  Gathering the data was a quick process,  taking less than 10 minutes per plane once we had the drill down.

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The calculations and results: Technically every pilot and A&P must know how to do a weight and balance calculation to pass his test. The reality I know is 50% can’t do a weight and Balance calculation to save their lives. On the other hand, I am particularly good at this, especially the complex variable of adjusting the wing fuselage location to correct the issue.

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One of the first things Ryan and I did was develop a complex computer algorithm that we could plug each planes data into and it automatically spit out the maximum pilot weight that the plane could take before it went out the aft limit of the design at 20.” There were several planes we measured that had A-65 Continentals that could only take a pilot of 130-135 pounds before going out the aft limit of the envelope. Several of these were being flown by 180-190 pilots. You can get away with this as long as you have the engine running creating high air flow over the tail, but if the engine quit and the speed decayed, the plane would be very prone to an unrecoverable condition.

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Rational people do not build airplanes to see what they can get away with, they do it to effectively master the skills and utilize the design correctly. Anyone arguing that it is “OK” to build and fly a plane at or beyond the CG limit because he has evidence that it has been gotten away with before isn’t a person who should be taken seriously, and their judgment can rightly be called into question. Using our data, any plane, even one with a light motor can be set up correctly to fly with a pilot of 220 pounds. Planes using a Corvair, Ford or O-200 can be set up to fly 300 pound pilots in CG.  Several of the examples we weighed could have pilots over 305 pounds and still be in CG. There is no reason to build your plane and not have it operate in the designers CG limits.

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Where you can find the full data set. Click on this link:

Pietenpol Weight and Balance article source

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 Most people don’t view it as their task to correct negative or dangerous things others advocate. They value “getting along.”  For a reason explained below, my loyalty lies elsewhere.

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I earned my A&P license from Embry-Riddle in 1991. It was in an era when the department was run by men who were former military, who had come of age in WWII,  Korea, the Cold War and Vietnam. They took aviation very seriously, they all had seen its potential costs. They were tough.  I am biased, but I do think the program was without peer.  At the end of training, a handful of select students, I among them, elected to take a solemn oath in a private ceremony  to swear our unwavering allegiance to aviation safety.

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We did not swear to protect our employers, nor to defend the FAA or their rules, nor did we swear to defend our friends, careers or egos. We didn’t even take an oath to protect pilots. The only people we were taking an oath to protect was unwitting passengers who would fly in planes, people who had supreme trust and the belief that their fellow man, an aviation professional, was trustworthy with their very life.  The critical element of the oath is that we might be the passengers last line of defense, and if it was so, we were to “forsake every other consideration to protect them.”

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To have some understanding of my perspective, spend an evening reading my Risk Management reference page.  If you only have some time, just read this story: Effective Risk Management – 2,903 words ” It include the statement “This was the first time I can clearly say I understood the cost of keeping your mouth shut. This was the first step to me becoming the kind of “Bastard” who publicly points out people doing dangerous things.” At the conclusion of the CG project I wrote the paragraph below when a builder sent me a photo of an 8 year old kid flying in a plane with an aft CG. Few people outside professional circles understood the tone, but I did get one short note from a guy who graduated from Embry-Riddle before I was born, when the school was still in Miami. He knew without asking I had taken the oath as he had, and the tone made perfect sense to him.

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” Many builders over 160 pounds with light engines are actually flying behind the aft CG limit, which is a great idea if you feel you have already accomplished every thing you wanted to do in this life. In my book if, you want to knowingly fly out the aft cg limit of a homebuilt, it’s your choice, I don’t base my happiness on the actions of others. If someone wants to tell other people this is a good thing to do, then they will find me disagreeable. If a guy wants to go a step further and fly passengers who know nothing about CG, like little kids, they will find me to be a vocal opponent of theirs, no matter who they are. When it comes to speaking up for the safety of unwitting passengers, I am not intimidated by any combination of the offending pilots wealth, experience, popularity or physical size far less peer pressure or being thought of as a mean spirited sob.”

Corvair/Sonex for sale, on Barnstormers, (warning)

Builders,

I received two emails asking about the plane pictured below. It is for sale on Barnstormers.com. Part of the add says “William Wynne engine”. This is not entirely accurate, but I don’t think it was done with ill intent. The plane is simply being sold by a friend of the builder who passed from this earth, and he is just offering a general description.

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A more accurate description would be to say that it has a “William Wynne style conversion.” I did not build the engine, nor did we see it run at a college, but it was made with our parts, and it does have a Dan bearing on it. I am pretty sure Dan supplied many of the installation components. Note that the pictures are of two nearly identical yellow airframes. One with a VW the other a Corvair. The picture above is the VW one, the Corvair looks just like it but has a spinner. For a complete overview of the Corvair/Sonex combination, please click on this link:

Corvair Power for Panther and Sonex reference page

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The plane is located in Eastern Georgia. The builder was a very experienced homebuilder, but I have never seen this plane in person. If someone wanted to look into buying this plane, I would highly suggest calling Dan Weseman for more input. On the surface, it seems like a very good beining point, that might need a through going over and a new cowl from Dan.  If is a much better starting point than any of the Corvair/Sonexes that have rear starters and mounts that were not made by Dan.

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While the plane above seems well worth looking at, I would like to warn potential Corvair people to Avoid something else I saw on Barnstormers:

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SONEX CORVAIR MOTOR MOUNT • $850 • AVAILABLE FOR SALE Engine Mount to install Corvair engine to Sonex airframes.   TD version – black  with hardware  • Contact- AZALEA AVIATION LLC, Owner – located Valdosta, GA USA • Telephone: 229-834-899 . 220-242-306 . • Posted February 6, 2014

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Above is the latest incarnation of the now Bankrupt “Aeromax LLC” and just like last time, this is again run by Bill Clapp. I highly suggest that no one buy anything from him. I left a long post about him on the Zenith Matronics site, there are also many other ones on  Mark Langford’s CorvairCraft list, and the factory Zenith list. You can contact many People such as Pat Panzera from Contact! magazine or Rick Lindstrom from kitplanes to get their input. Make up your own mind, but there will invariably be people who get taken by this, just the way that Aeromax took people in 2009-before going bankrupt in 2011. Don’t be one of them.

Woody’s 2,850cc Corvair/601XL hits 400 hours.

Builders:

I spoke to our “Man on the west coast” 601XL builder and pilot Woody Harris last night. I caught him on his cell phone after he had just landed at Merced CA. He was short of his home destination, Vacaville in Northern California. He and a friend were shut out from returning by weather. No matter, Woody’s daughter lives near by, and they were having a beer in the pub while they were waiting. Woody is the kind of guy who is flexible enough to have a good time in any situation, even if it was unexpected.

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Woody and His friend had been all the way down in Southern CA for a particularly extreme off road race called “the King of the Hammers.”

(http://en.wikipedia.org/wiki/King_of_the_Hammers)

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His friend had driven in it, spending 14 hours the day before behind the wheel. In the middle of the 10 minute call, Woody mentioned that he had just crossed over 400 hours in his plane, (N743WH). To people who do not know homebuilts this sounds modest, but it isn’t. For a variety of reasons, less than half of homebuilts reach the 500 hour mark. But it isn’t the hours I find impressive, it is the fact that Woody has flown his plane all over the country and had some incredibly good adventures.

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What should be important to you is that his plane and 2,850cc Corvair engine are straight out of our parts catalog and installation manual.  In the links below, I relate that Woody is not a life long aviator. He has been in the game just a few years. In short, there is no reason why anyone reading this couldn’t achieve what he has done. Woody took our proven path and used it to serve him. While it did take time and cost money, neither of these are the major hurdle to others doing the same adventure. The single biggest impediment is just deciding that it is your time to get started on this adventure. I can show you how to build the engine and install it, I can put  you on our ‘Zenvair builder list”, I can have you at a college, offer all kinds of support. But the one thing I can not do for you is to make you get started. That decision must come first.

I was going to say that you must have faith in your own ability to learn the skills you will pick up in the building and learning to fly process, but faith is the wrong word. Technically, faith is belief in the absence of evidence. Deciding that 2014 will be your year does not require faith, just observation. Your belief that you can do this can simply be based on observing that Woody, and dozens of other Corvair builders have done it. Some of them might have predeveloped skills or a bigger budget than you, but that just changes the time line a bit, the opportunity for adventure is just as open to you. You just need to decide that you will do this.

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The Woody Harris Corvair Powered Zodiac Zooms Toward OSH

Above, Woody’s plane on the way to Oshkosh 2011. For starters, I am going to confess to stealing most of these pictures off  well-known Zenith 601 builder, Steve Smith’s website. My only defense is that I always ask our guys with flying planes to send in pictures, but a lot of them are too busy having fun. Woody is part of the group of guys that move from one adventure to another without documenting many of them. Steve is a California based 601XL builder with a Jab 3300 on the front of his plane. He, Woody and Zenith’s west cost guy Doug Dougger (who has an O-200 in his bird) fly around together on a lot of trips, including a big one to Oshkosh that provided some of these photos.

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Woody in the Grand Teton National Park WY

 Woody flying over Grand Teton.

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Doug and Woody in South Dakota

Woody and Doug Dougger over South Dakota.

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Woody Harris and Sebastien Heintz in front of Woody's 601 at QSP open house May 5, 2012

 Woody needs little excuse to fly places; Above he is speaking with Sebastien Heintz, president of Zenith Aircraft, at a West Coast Zenith fly in at Quality Sport Planes in Santa Rosa. This facility was the site of Corvair College #11.

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Three Zenith Aircraft at the Chicken Strip, Death Valley, CA

From Steve Smiths Website: “Left to right: Woody’s Corvair powered Zodiac XL, Doug Dugger’s Jabiru powered 750, Steve Smith’s Jabiru Powered Zodiac XL. The Chicken Strip is a dirt/gravel landing strip in the Saline Valley of Death Valley National Park. Lat/long is 36.807,-117.782.
This was one of the stops on our trip home from Copperstate flyin in Casa Grande AZ.”

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Four Zenith Aircaraft on display at 2011 Golden West flyin, Marysville, CA

Above Woody’s plane among friends in the Zenith booth at the Golden West fly in.

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In the above photo, Woody Harris’ 2,850cc Zenith 601B sits at the end of the ramp in North Carolina at First Flight Airport with the Wright Brothers Monument in the background.

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Christening Woody, above left, and his friend Steve celebrate with cigars and Piper Heidsieck champagne after the first flight.

In our booth at Oshkosh 2011, I stand with three pilots who flew in their Corvair powered Zeniths. From left to right, Shane McDaniels who flew in a 2,700cc CH 650 from Missouri, Woody Harris in a 2,850cc CH 601B from California, and Andy Elliott in a 3,100cc CH 601B from Arizona. If you would like to be in a future version of this photo, you must willfully decide to advance your dreams.

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I was looking for something else on the internet and came across a discussion group called something like “Homebuilt Planes” and a sub group called “aircraft design”. It had pages of commentary on Corvair engines. The group had only two people with the message ‘apearently they work,’ but these voices were drowned out by a chorus of people, all with pathetic mystery email names like “RV6guy” comparing alleged  engineering analysis of the viability of fly a Corvair, and all citing their ‘race car’ backgrounds. Their Conclusion: It can’t be done. They gave long dissertations about how small the main bearings are (Reality: Corvair’s have much bigger mains than an O-200) That 5th bearings will not work, (there are more than 100 flying including Woody’s) you would need a reduction unit (99% of Corvairs have never had one) and props above 2,500 have no efficiency ( Lycomings are certified at 2700 to 2800 rpm, they didn’t add that last 300 rpm to make less thrust).

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How do I say this diplomatically? Those people are losers, and they are the exact type of critics that T.R. found contemptible. If you believe the analysis of anonymous sources over facts and real people with names and planes like woody, then you are letting people you never met decide your fate, rob you of your adventure, and make you into their kind of loser. I can not explain how little I think of people who don’t have the courage to even use their name when publicly criticizing the efforts of actual people. I just wrote the story Four Men, about aviators I met who fought in WWII. On the scale of courage that these men understood, using your own name on the internet when criticizing others requires about .0001% of what they delivered every day.

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For the 25 years I have been building homebuilts, there has always been people like that. Years ago, their effect was limited to earshot as they would criticize the workmanship on planes at the flight line. Back then, I often took a moment to say in front of everyone “You sound like an expert! Please, lead me to your aircraft so we can all see it.” which of course, they didn’t have, because just like todays internet people, they were critics, not builders in the Arena. These people will never go away. The vital thing to do is make sure they don’t steal your dreams.

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Here is the good news: Positive real people can have the opposite effect on you. I have spent many hours in Woody’s company all over America, and I can attest that the guy is the pied piper of adventure and fun. Just being around him makes you think of all kinds of good things to do, and if you mentioned any of them, Woody will either say “That’s great! I love doing that” or “Sounds fun, lets try it.”  If you know that you want a shot at having Woody’s kind of adventure, I highly recommend spending time around him, it is the perfect antidote for previous exposure to negative people and mystery email names. -ww

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For more reading and pictures of Woody’s story:

Zenith 601XL Builder Woody Harris at Copper state flyin.

and also get a look at:

Zenith 601XL-2,850cc, Woody Harris