Ooish!!! Jamie,
That 150 might be waaaay too much for a quarter scale STEARMAN, I am building a third scale Balsa USA STEARMAN at the mo, and I am putting a 3w 140 twin in it. (Cant afford the radial)
. 118 inch wingspan, 50 pound weight.
I cant post pics here, Because "I are too Stupid".
Send E-mail and I will send a pic or two.
Cheers, Si.