What size plane is about right for an OS .25VF?? I'm pretty sure I lack the upper body strength necessary to handle a larger piped engine/plane, but I have a pair of these little jewels.

I have plans for Whiteley's Shoestring, which is designed for a .60, and ws considering shrinking it 20%. This would yield a plane of around 47" span, with 425 sq.in. area. Suggestions, please??

Ralph

The only place I've seen anything printed about the piped 25VF for stunt is Mike Starrett's Eliminator in the May 96 Flying Models.  The Eliminator is 565 square inches.  In the article he says a good substitute would be a muffled 35 or piped 40FP.  I've been playing with a piped 25F for a couple years now.  It's not too far removed from the 25VF, it shares the same specifications except it's a side exhaust instead of a rear exhaust.  I've been running the 25F on a Primary Force ARF.  The engine has enough power to haul 490 or 500 square inches without a problem. 
Dan's Wimpact at under 450 square inches seems way small for a 25VF.  I'd look for something intended for a strong 35-40 and build it light.  The worst part about the 25 sized piped engine is working out a setup since it's not at all popular.

Thanks everyone, for all the info and suggestions. I decided to go with an RSM Chizler, mostly due to Keith Trostle's urging (and the fact that I've always liked the Chizler). I sent the plans to Randy for suggestions/recommendations on the pipe system. If I can keep it under 40 oz., it should be a great performer!

Ralph