Above the link, the image above is Phil Maxson pouring the oil in his plane here in Florida yesterday. It is a great feeling in life to have friends like Ken and Phil, and to do projects like these videos with them. Over three decades of working with Corvairs, I have had a lot of fun moments with good friends, some here, some now gone, but this stuff we have done this spring is a match for any of the previous good days.
We are more than half way to the 1,000 subscriber goal. Please take a moment when on youtube to join my channel. You will be informed of every new video when it is up.
I was forwarded the image of the modified Pietenpol pictured below. It is Corvair powered, and I have been told it was signed off by the FAA, but I don’t have a record of working with him.
UPDATE: The builder of the plane has sent a request saying that he wanted the image removed from this story and from our FB ‘Corvair College’ page. He prefers to not discuss his plane in public. I offered to help, meant it. I’m leaving the rest here because first time builders need to understand having a 100 people tell you on FB your plane looks nice isn’t an endorsement of the details.
Above is the Plane in Question. I do not consider it airworthy, even though the FAA signed it off. The first thing Piet builders will spot it the tiny weak diagonal cabanes, as I discuss here: Pietenpol Fuel lines and Cabanes and here: Fuel lines and Cabanes, part 2. But that isn’t the main point, it is the Vee shaped lift struts on a parasol with near vertical cabanes and a center section. It is not structurally sound.
In 1989, a guy in my EAA chapter, #288, named Bob Spenk, built a steel tube Grega with a nearly identical lift strut arrangement. To my then-uneducated eye, it looked fine. The Embry-Riddle department chair of engineering was also a #288 member, and he sat down and explained that the new strut arrangement had almost no ability to resist the wing rotating in relation to the fuselage, and any differential load, such as deflected ailerons, would impart this. He explained that in a cabin airplane with the same lift struts, the upper longerons contacting the rear spar and the diagonals in the fuselage resist the twisting, and he showed us that one of the largest tubes in a J-3 fuselage does this. He went on to show that a heath model V parasol has no center section, but it still requires diagonal brace wires from the rear spar lift strut attachment to the motor mount. He pointed out that a it was superseded by the Heath N, and follow on airplanes like the Baby Ace, with parallel lift struts are required to have the diagonal brace wires between the lift struts, even though they have no center section. Aircraft structures is a very complicated business, and it doesn’t care if all the local hangar fliers say “I will be alright” and it doesn’t care if all the people on the internet say “Its just a low and slow plane’. neither of those statements will make the plane right. it doesn’t work that way.
“Hey, William Wynne, you are a jerk, mind your own business, the guy is probably very nice and you are only pissing on his parade. He probably isn’t even a customer of yours. This is why many people think you are an ass.”
…….In 2016, a lawsuit for $350,000 was tried against me. It came from a person who had a Corvair in their plane, but never bought a single thing from me. If you thought that couldn’t be done, I understand, I didn’t previously believe it was possible either, but yes, it can get to federal court.
……..If you work in aviation, or even spend time here, you will have to decide at what level you are Your brothers keeper? I have long ago decided that I’m fine with many people thinking I’m a jerk for pointing out something like the plane above, but I am unwilling to go to bed at night and try to sleep with a pillow made of justifications and rationalizations.
“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.”
Welcome to our new webstore.
Thanks for visiting! Dismiss