Thanks Dave,

The twin disease is bad and even an occasional fix doesn’t help.

I have a hand me down pattern airplane in reasonably good shape with sheeted foam wing (1580sq. in. or so). Original plan was to use a Ryobi and fly it as a single. I had already mounted the engine. While checking to see if it might be used as a twin the wing loading was checked. Surprise the airplane will weigh will be just short of 20#. Oops maybe a Ryobi won’t fly it at 20# and 28oz/sq ft. Engine far away from fuselage for prop/gear clearance, not much ground clearance along with 35oz/sq ft wing loading gives serious concern as a twin. It would probably work great with three 90 two strokes on glow.

So far my twins have been conservative and successful. With enough power 28 would be OK. But 35 in a twin is not conservative. Good news is the wing would be plenty strong.

The other airframe being considered is a 96” Stick with symmetrical wing and dihedral. It is 35# and flying with a 57cc gas engine. Rough calculations indicate that as a triple it will require 2# in the tail and as a twin 1 1/2# will be required in the nose. A triple would be in the 47# range. I didn’t build the overweight monster but have been flying it for years.

Thanks again.

Bill