The Dusty Deuce-a twin engine Diamond Dust
This one isn't super fast, but it's faster than most sport planes. Once it is trimmed, it is stable and easy to fly. It does have a rudder so you can correct for an engine out or do acro.
I designed the modification to a stock Diamond Dust kit. I used longer carbon fiber tubes from a kite shop and extended the wing. My buddy Carl "Flaps" Laffert, a WW II Marine aviator, did the construction.
Power: 2 OS .25FXs, 9-6 props. (The center-to-center spacing is 11.5" so a pair of .46s could be used.)
Span: 47.5"
Area: 880 sq in
Weight: 4# 14oz
Wing Loading: 12.75