Greetings
.
My wife's Rascal 40 ARF performs very, very well with a seasoned TT .36 pro swinging a MA 10 x 6 prop and a Fox RC long glow plug using 7% Omega (Our custom blend.). She originally tried an 11 x 5 but it didn't work as well.

To get the engine installed, she cut both sides of the bottom of the of the fuse off, to 1/4" over the engine mounting face, back to within 1/2" of the firewall. She then made cut-outs for the muffler and needle access and routed the fuel tubing to the outside.
Lite ply tabs were glued to the un-cut portion to which the loose sides were then screwed. The cut edges were mono-koted.

She re-located the landing gear 1 1/4" forward to eliminate any chance of nosing over. The tail feathers were keyed and doweled to the fuse for alignment and strength (experience with her H9 trainer). The aileron servo mounting plates are lined with lite ply rather than have the blocks simply glued to the plastic (again, experience). Wing mounting and landing gear screws are changed to 1/4-20 nylon. It all came to 5.5 pounds.

During flight tests we found that the wing incident angle needed changing. A phone call to SIG resulted in "...Duhhh...ours flew o.k." The trailing edge was raised about 3/16" which required adding a piece of balsa on top of the fuse directly behind the wing saddle.

Even tho the model is well done, I personally feel it is over-priced compared to the others on the market and the past 36 ARF's we've done. But it was her money!

regards,
DGO