I've been reading some of the threads out of the archives on speed control and engine set up: "back side of the power curve" etc. Very interesting stuff! I'm wondering what are you fundamentally trying to achieve? Is the bottom line to have the airplane fly at a constant "q" (dynamic pressure)? It's not too hard to imagine a mechanical (or electro mechanical) device that directly connects dynamic pressure to a throttle: higer pressure reduces the throttle, lower pressure increases throttle. By virtue of reacting to changing "q" it would automatically take into account all the density altitude effects... System dynamics (response time, damping, etc.) could be significant problems. Such a device would probably not be "legal" for PA competition?
Constant "q"?
Stuka Stunt Main Forum · 8 of 8 known posts recovered
Basically I would consider it a matter of timing and tension. If an airplane slows too much in a corner, for instance, it can lose tension just at the point you need it. But, more importantly, it throws your timing off. You want the engine to increase power (thrust) as you aim up, and decrease as you go down. Basically you want the third loop the be the same speed as the first, each loop or segment of the eights to be the same. On the squares you want it to come out of each corner the same and fly each leg of the square the same. Again, if the plane speeds up in consecutive maneuvers, that is no good. If it slows down on the up leg and speeds up on the down leg, that is no good.
There will, of course, be variants, depending on the flyer. Some like more "charge" coming out of the corners than others. Some like a same, even, engine run that won't gain or lose anything. But just a one percent difference in improvement can sometimes make all the difference in the world.
Leonard Neumann
Ron.. good concept! Would do what is needed to control aircraft speed. The thing is .... we would have to put the R/C throttles back on our LA's! 
Igor Burger · Jan 28, 2004 02:08 PM
#3 sourceMay be not dynamic pressure, but may be even better 
>May be not dynamic pressure, but may be even better
Fascinating! Is that a spring balanced mass actuating the throttle?
I can envision several possible advantages to that concept...
What is the white gob of stuff where the glow plug normanlly resides?
Yes, the spring is directly on r/c carb
that white stuff is paper in plug hole
In the words of a younger generation, "way cool" 
How well did it work?
