The Top Flite version of Ken Willards Schoolboy flys great.
Mine has a Cox Pee Wee (.020) motor with an Adams baby actuator designed for rudder only. I have added a mechanical linkage to include mild elevator action. Total weight 11 ounces.

I think the 36" version would fly very slowly & only on calm days.
Try the 36" version & let us know here at RCU if you like it.
You can always shorten the wing if desired.

Bob