I just found out that Enya has a reverse crankshaft for the Enya SS50 and Zinger has the 12x5 pusher prop that will complete the setup.

Is there a significant advantage in running the engine clockwise?


Martin

It has been my experience that reverse rotaion of one engine on a twin is not really needed.

This has been my experience despite all the stories told about the dreaded inboard engine cut out, resulting in a spiral of death because the plane torqued in towards the pilot.

Virtually every twin I've had and flown, has had the inboard engine shut down first, numerous times. The line tension may get a little softer, but the plane was still under control, even in the wind.

Of course, there are a few things to avoid in an engine out scenario with a twin stunter.

It's best to not fly above 10 feet, in other words, stay low. The remaining engine, because of the increased load, can lean out making for an over run. I once ran on one engine, an fp .20 for a total time of 18 minutes. That's with only 2 ouinces of fuel. The other engine died after only a minbute or so of flight time.

Whipping the plane in an engine out situation, should cause the running engine to burn more fuel faster.

Lastly, when it comes to twin engined stunters, the goal is to match everything up, engines, fuel loads, props and such, so the quality of the runs are as close to the same as possible. The limited availability that exists for reverse rotation props is a true hinderance, and the ultimate reason I prefer to run both engines the same direction.

Thank you for the replies and comments.

I'll try a Zinger 12x5 and 12.5x5 (cut from 13x5) with  the regular engine and see how well these props perform with the Enya SS50. Depending how well they work I may get the reverse crank and some pusher props just to try and see for my self if there is any advantage running the engine in reverse (clockwise).  It seems there should be more gain then loss having the torque pushing to the outside.

later,

Martin