Since no one has replied, I'll take a stab at it.

First off, that's cool model, where can I get one ?

If you want to put a Nelson in it, best to speak to Dave Shadel at Performance Specialties. www.pspec.com The closest engine that will do the job is probably the Nelson Quickie 500 engine fitted with a carb that will idle. Dave sells after-market carbs that will fit on the Nelson to provide some sort of idle. I'm sure he can provide an engine to be competitive with the Jett series. Because the motors are optimized for top speed, the idle will likely be pretty fast. You'll probably have to land dead stick or kill the engine on final approach.

The Q40 and FAI engines are optimized for top end and are not designed to idle. The Q40 and Quickie engines have a side exhaust. The FAI engine is rear exhaust. I don't know why you would want a rear exhaust as it would mean punching the pipe right through the middle of your fuselage. Why not stay with the side exhaust 1/4 wave tuned pipe that is stock with the Quickie engine ?

There has been some experimentation years ago on trying to optimize aircraft design for turning left. The laws of aerodynamics are pretty clear. When it comes right down to it, you want a good clean aircraft that flys well in all attitudes. The secret appears to be in the airfoils. Low drag, low weight, properly trimmed, properly balanced - these are the basics to flying fast whether you're turning left or right. Did I mention pilot skill and years and years of practice along with the mistakes that accompany those years?

cheers,

Randy S.