Glenn Torrance [link]http://gtmodels.com[/link] has the best DR1 Triplane kit on the market but that radial may be too much for it. (You might have to go up to 1/3 scale (from plans) if you have to have that radial.) I'd check with Glenn before committing to it. He designed the 1/4 scale for the OS 160 FS twin.

Balsa USA also has a DR1 in 1/4 scale but it doesn't look to be exact scale like the Torrance kit.

STAY AWAY FROM ARIZONA MODELS!!!!!

Yak