im gettin a little tired of fixin the motor on my .15 qor . anyone have a good pusher motor design? maybe even a canard?

I'm not sure a pusher would work out to be legal. Remember, you have to use the MAS 8x3 prop. Unless the rule is altered to allow a pusher 8x3 (assuming MAS makes one), or unless you could find a crankshaft out there to re-time an engine to run the opposite direction, you'd have some problems.

Also, you'd need to run the Mag or Megatech engines. Bushed engines don't run in pusher configuration well, there is nothing to keep the crank from sliding forwards and chewing in to the backplate, as I understand it.

That aside, a canard is something I've considered a few times, but I always come back to one really good reason not to do it. If you're going to run in to someone, doing it with your pitch control first seems like a bad idea. Depending on how you design the plane, you might wind up stripping a lot of servos and looseing pitch control a lot in mid-airs.

Hand launching a pusher should be possible, but isn't something I want to do either, esp in the heat of a combat match.

On the flip side, I do wonder if you'd break less props in mid-airs using a pusher configuration, which might make flying out of them easier. Hard to tell.

I'm not saying it couldn't be done, just that it's a lot of work.

thanks for the good insight,
no 8x3 pusher prop from ma, and i'm with you on the rear prop hazards. a rear monted tractor design sound intreging though!
well back to thedrawing board.

Hey, if you can build it, we'd all love to see it. It has potential.

A mid-engine, or rear mounted tractor has problems with starting. You have to get to the front of the prop. A pod mounted engine is just as exposed as a front mount, and more likely to get blown off the plane and lost in the tall grass, I'd think. Still, it could be possible, just problems to solve.

well... food for thought ... how 'bout a flying wing sim to a gremlin with a mid engine mounted JUST high enough to use a conventional starter?????? hmmmm now where is that old drafting kit of mine?

How about on the line of a P-38 with the pusher in the midle

[8D]

yup,
i'm thinkin a twin boom tail with a forward faceing(conventional tractor) engine mounted as far rear as posible just high enough to get a regular starter on it. mount the motor in the wing ....sort of a blend between a gremlin / p-38 / northstar....hmmm now really, where is that old drafting kit???

there is a plane on ama's plans list called a "joe cat" may 92 i think. this is simular to a bob violet king cat except it is for a .18 ducted fan.
it would be easy to kit bash this into a rear mounted (tractor or forward facing ) engine with a slot for the prop to rotate in simular to a northstar.mount the motor so a conventional starter works. elongate the wings with whatever airfoil floats your boat and go kick some butt.

OzMo