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Old 05-05-2006, 01:00 PM
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Default RE: 1/2a speed plane wing design

Hmmmm... complicated stuff. Sounds like it will not be one of the cheaper models to operate.

I don't quite understand the concept you are describing below. Is the tin tank pressurized, or is the engine relying on suction to keep running? If it is presurized, how? The pipe of course does not have a pressure fitting on it like other sport engines.

Thanks for all the help by the way.

ORIGINAL: combatpigg

One oz of fuel goes quickly, you might be better off taking an inch out of the nose [back to 6 inches instead of 7] and trying a soldered tin tank with a fixed pick up and make it big enough to hold 2 ozs..this set up is good enough for the C/L speed guys, the down side is they have to send the planes off richer, and anticipate the pressure build up as the speed increases. This is what makes suction, suck. It is more guess work, and you aren't hand launching with enough power. With a bladder, I launch on the pipe, and as rich as it will tolerate and still be in resonance.