The Wittman Tailwind is probably the most famous aircraft you've never heard of. Steve Wittman's cheap home build cross-country sportster kick-started the home build boom in the 1950s and it's still being built and flown today.

Peter Miller's 48" span model reproduces the Tailwind's pleasing lines and flies superbly well using a .20-.25 two-stroke or four-stroke equivalent engine. The huge fuselage means an electric conversion should be easy to engineer too. 

Builders will be pleased to learn that a new CNC/Laser-cut parts set speeds up the build process by reproducing the ribs, formers and other items (apart from strip balsa) required for the model while a wood completion pack that includes the strip and sheet is also available. The cowl is made using balsa and ply.

Ton Van Munsteren's electric conversion build blog (with lots of pics below) can be found in the forum here and builders can chat with designer Peter Miller too.

DATAFILE
Name: Wittman Tailwind W-10
Model Type: Scale
Designed by: Peter Miller
Wingspan: 48"
Fuselage length: 39"
Wing area: 360 sq in
All-up weight: 66oz
Wing loading: 26.4oz/sq ft
Functions (servos): Aileron (2); elevator (1); throttle (1); rudder (1); flap(2)
Rec'd Engine: .20-.25 two-stroke/ .26-.30 four-stroke