Wow John, that Stinson Trimotor Is really cool. Great lines. Sharp model.

I spent a lot of brainstorming time on the Rc Trimotor Bi-plane. I kept bouncing around on motor size and thus airplane size and still am to some degree. I am thinking .15s to .25s two strokes for cost control versus 4 strokes. I would not try to model the Boeing model 80. It is just inspiration. My intent was more as a Sig Kadet variant. I think 3 .15s should work for around 1200 to 1300 square inches. Should be close to the power of a single .45, which is the power level of a Kadet SR. Another floater just like the Kadet SR. Just smaller span and chord. 10 inch chords. 54' bottom span and 66" top span for 1200 square inches.

To solve the 1 chord gap issue and still not have an overly deep fuse, the solution I came up with is to make the bottom wing and inverted gull wing much like the f4u carrier plane of WW2. At first I thought a gull wing top wing, but the inverted gull wing bottom wing would look better and be more practicable engineering wise I think in it that also allows for short main gear struts.

So since you last post I have been thinking about the CL version. And you know it just has to look like a Ringmaster variant. Keep the taper of the wings like the RM with maybe a straight section out to the engine nacelles and then taper. Same tail as the RM.

Perhaps it makes since to shoot for the same size planes and just build both at the same time. 2.4 radio for throttle. A near carbon copy of fuses except for wing saddles. Symmetrical foil for CL version and Flat bottomed Kadet foil for RC version.

A big concern for me is excessive line pull for the CL version. Would .15 or maybe .20s be enough? Lightweight slow flier would go a long way in reducing excess line pull. I just don't think my back can handle to much pull.

Silk and dope finish. Flying wires mandatory. Pictures of passengers in the windows in period dress (late 20s) also mandatory.

I will have some time late this week to draw out and post my ideals (again). I can't find my original drawings.

I love the triple vertical tails but hate the unequal wing chords.

This is one of those ideals I just can't seem to shake. I first conceived of the RC version over a year ago.

Maybe I should start new thread in the multi engine section of the proposed project?????? I will certainly need the input and advice of better more experienced builders and designers than I am. Hint hint John.

.Ken