Re: Modern Engines on Q2?

One Sky Dog

No news here. Running an engine designed to put out a reliable 40 hp pumped to 200% duty cycle to get 60 to 70 hp decreases life and reliability. Look at HAPI 60 to 90 hp conversions, all with fatal flaws.

Compared to an O-200 designed to put out near 100 hp at 7:1 compression loafing below 3000 rpm. Burt quickly found out the VW converters were exaggerating hp and reliability. So after two VW’s the O-200 was put on the prototype.

On Friday, April 22, 2022, 5:02 AM, Bill Allen <billallensworld@...> wrote:

Yes, and in the early CPs Rutan gave the reason for the change from a VW to a Continental as “reliability” (too many engine failures)……

On Friday, 22 April 2022, Ryszard Zadow <ryszardzadow@...> wrote:
The original Varieze had a VW, which like most that try an auto engine, got changed to a Continental. 

If he’d not done that I doubt it would be the success it is today. 


On Apr 21, 2022, at 20:43, John Frank via <> wrote:

I’m glad that when many people told Mr. Rutan that these crazy looking airplanes couldn’t , wouldn’t , shouldn’t fly, that he didn’t listen to the naysayers and continued on.

John F

On Apr 18, 2022, at 11:27 AM, Bill Allen <billallensworld@...> wrote:

What Ryszard said.

Also depends on your ambition and appetites for either flying or long term R&D….

Bill Allen

On Sun, 17 Apr 2022 at 23:47, Ryszard Zadow <ryszardzadow@...> wrote:
Show me any auto engine conversion that made it to 2000 hours. 

Auto engines don’t fly. Everyone i’ve known or heard of that’s tried went down one of three paths:  

1) Eventually went back to a Continental or Lycoming and flew happily ever after, 

2) It became a hangar queen. 

3) It killed them. 


On Apr 17, 2022, at 16:40, britmcman99 via <> wrote:

No. No. No. Revmaster is a very well engineered adaptation from few Volkswagen components with aviation born crankcase, forged crankshaft design. Sharing cylinder and pistons, con rods, Revmaster is very well thought out adaptation. Weaknesses in early magnesium crank cases have been mitigated with an alloy crank case with a 7 pound penalty. Notwithstanding, the current state of the art is likely the best offering of all other aero engines based upon Volkswagen components. 

On Apr 17, 2022, at 1:05 PM, ryan goodman via < > wrote:

We are putting an aeromomentum am15 ok our TriQ. 

On Sun, Apr 17, 2022 at 13:53, Robert Cringely
<bob@...> wrote:
Revmaster is a car conversion, no?

On Sun, Apr 17, 2022 at 3:41 PM Robert Schmid <robert@...> wrote:

[Edited Message Follows]

Curious what modern engines people have put on their Q2s for upgrades? What else beside an O-200?
How about a Rotax 912ULS?
How about a UL260?
Which car conversion engines have been popular with the Quickie community?

Yes I know this is a controversial topic with the hard core aviator but please humor me and share what people have used, not your thoughts on how good or bad a car conversion is ;-)

Thanks Robert
Robert "TheFrisco" Schmid
(408) 805-5450 TheFlyingFriscos

Love building planes almost as much as flying. Latest completed build is "Loki", a Chinook Plus 2 bush plane.



Join { to automatically receive all group messages.