Part #3901-A Zenith/Bearhawk Stainless Exhausts, now on shelf.

Builders:

Out of the many different models we offer, our best selling exhaust system is #3901-A, the model that fits all Zenith 601/650/750 aircraft, and also coincidentally fits the Bearhawk LSA. Because of it’s quality and popularity, it has usually on backorder for all 13 years we have offered it. The average delivery time has run something like 90 days. However, as another sign of the progress of 2016, we have made a very large batch of #3901-A’s, enough to cover all the existing orders and put about 10 more sets on the shelf.

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Above, a picture of a bin with 8 sets of exhausts in it waiting final inspection. The picture was taken in the SPA/Panther shop. Over the years I have personally welded several hundred stainless steel exhaust systems for Corvair powered planes. Welding stainless is a skill that most welders never develop to a standard required by aircraft exhaust systems. They rarely understand the requirement for continuous internal purging of the weld, nor do most “local experts” understand the benefits of low hydrogen filler rods and pulsed welding.  Fortunately for me, when my plate is full, I can have Travis, the head of welding at SPA/Panther weld many of the parts in our catalog. He is professionally trained by one of the nation’s oldest welding schools, he now has a number of years of experience, his uncorrected vision is perfect, and his concentration and focus are phenomenal. This most current batch of 3901-A’s are Travis’s craftsmanship. I inspected them closely, and I have to admit that the workmanship is as good as mine ever was.

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If you would like to learn more about #3901-A exhausts, follow this link: http://shop.flycorvair.com/product/3901-a-zenith-exhaust/. If you know that you will need one of these systems for your aircraft, and you would like to avoid any type of future delay, you may consider ordering one soon.

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New Front Spinner Bulkhead 

Builders:

For the last 15 years we have made a part called the “Front Spinner Bulkhead”. In our conversion manual numbering system it is Group #4000, Part #4002.  It is just for Corvairs using Warp Drive Props and the Van’s 13″ spinner. The part has traditionally had a molded fiberglass bulkhead with an aluminum crush plate. Below are pictures of the latest version, it has been modified to be 100% Aluminum. All of the existing backorders on this part have been filled with this new design.

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Above, a look at the part from the engine side. This is the 3/8″ thick crushplate required by Warp Drive Props. It is a precision CNC part.

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Above the spinner side of the part.  The six large holes allow getting a socket on the prop mounting bolts. The spun aluminum part starts out life as a Van’s aircraft part, but it has been fed through the CNC router at SPA/Panther to produce the correct SAE#1 bolt pattern and enlarge the holes for clearance. The complete assembly is put into a lathe, and checked for trueness. These Aluminum assemblies are slightly lighter and more true than previous Aluminum/fiberglass models. The sticker on the part shows that it has passed the final assembly check.

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This improved part is another example of how builders have benefited from my collaborative work with the Wesemans. 2016 has been a year of progress on the manufacturing and distribution of a number of products, all of which adds up to builders having a better opportunity to Learn Build and fly.

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To learn more about the part, follow this link: http://shop.flycorvair.com/product/4002-front-spinner-bulk-head/

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