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i've been told by engineers that automobile engines are not suitable for aircraft use for two major reasons. one is the extended time the engines are run at wot at take off. would any of us trust our lives on whether our engines would run repeatedly (hundreds of cycles) at wot for 5 minutes on a dyno? i wouldn't. and second, the harmonic vibrations developed by the engine are damped by the automobiles drive line. in an aircraft the propeller adds to the harmonics and causes crank shaft failure. in my wild and woolly youth i considered a home-built aircraft and talked to an aircraft engineer i knew-he emphatically said "no".
there's a reason aircraft engines cost $25K.
Just about every type of engine has ended up in an experimental aircraft somewhere.
I was involved in the Papa 51 Thunder Mustang company, using a Ryan Falconer V-12 with a custom gear drive - quite a ride
Automobile engines are perfectly suitable for aircraft use when properly configured and installed. And experimentals are a riot
Production general aviation aircraft engines cost well over $25K because of liability and certification - not because they're any higher quality or safer. They're for the most part low compression, low technology, horizontally-opposed air-cooled 6 cylinder engines making very low power per CID.
This is my bird with one of those low-tech engines; I figure it's OK to share a non-automotive toy given the topic
From: I may be getting old but I refuse to grow up
Originally Posted by jnb5101
i've been told by engineers that automobile engines are not suitable for aircraft use for two major reasons. one is the extended time the engines are run at wot at take off. would any of us trust our lives on whether our engines would run repeatedly (hundreds of cycles) at wot for 5 minutes on a dyno? i wouldn't. and second, the harmonic vibrations developed by the engine are damped by the automobiles drive line. in an aircraft the propeller adds to the harmonics and causes crank shaft failure. in my wild and woolly youth i considered a home-built aircraft and talked to an aircraft engineer i knew-he emphatically said "no".
there's a reason aircraft engines cost $25K.
And yet they're still building small aircraft using old Corvair flat 6 engines
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Originally Posted by billla
Just about every type of engine has ended up in an experimental aircraft somewhere.
I was involved in the Papa 51 Thunder Mustang company, using a Ryan Falconer V-12 with a custom gear drive - quite a ride
Automobile engines are perfectly suitable for aircraft use when properly configured and installed. And experimentals are a riot
Production general aviation aircraft engines cost well over $25K because of liability and certification - not because they're any higher quality or safer. They're for the most part low compression, low technology, horizontally-opposed air-cooled 6 cylinder engines making very low power per CID.
This is my bird with one of those low-tech engines; I figure it's OK to share a non-automotive toy given the topic
That's a beauty, must be fun, a 50cal sticking out of that hole in the front would be really
As for experimental engines and homemade engines you couldn't pay me to go for a ride in one. We can't even get our motors to run half decently on four wheels on the ground a lot of the time, let alone flying around with a prop attached to my 427ci, no thanks. Unfortunately I knew a couple of guys who are no longer around after building "experimental" airplanes in their garages many years ago.
The only way is an aircraft engine that has been looked over and tested by an airplane technician after a different technician has already passed it. Watch out for Chinese parts in this field of mechanics too
Last edited by MotorHead; Aug 22, 2012 at 03:05 PM.
Thanks It was a liasion plane and never armed...and that hole is the air intake!
I've flown a bunch of experimentals...and some are more experimental than others.
Aircraft engines are used for the vast majority, but there are a lot out there with Subaru engines and other weirdness. They're typically a ball to fly - fast, light on the control and aerobatic. Heck, my bird is a 1948 - so it ain't exactly new
FYI Bud Warren, the designer of that reduction drive, crashed and died with his daughter/business partner. Though he was an degreeded engineer and i really admired his effort his website is not an appropriate to promote - at least thats how i feel.
Nice to have a "bird". Is it Aerobatic rated ?
Did my plane drivers ticket years ago, not flown for ages, miss it, did my Aero rating just after PPL, best ride you can take friends on.....ever