ORIGINAL: paw080 Well GG, my Ringmaster Jr, powered by a PAW .080 SBR weighs 7ozs. To me, that is optimal for the smallish 195sq'' wing area. I fly it on .008'' X 44' lines. The Ringmaster Jr actually is a bit small for the PAW .080. It would fly even better at 230-240 sq''s. Your OS.15FP is overkill for such a small model. If you could build the full size Ringmaster to weigh about the 18-19 ozs; your .15FP would fly it beautifully on 54'-56' lines. Or a more simple project would be a Profile Peacemaker(approx. 300sq''s) using the .15FP for power. I have built and flown many 1950-1960's 330-395 sq'' models using .15 diesels; that includes full size Flite-Streaks, Veco and Dumas Tomahawks and a CLC Super Clown. Tony
That is rather light, Tony. Without the engine, wouldn't that be a 5 oz. plane? I gather that the diesels provide you with the power of glow at less weight swinging the same size props.
I built mine with the kit wood. Less engine and muffler at about 6 oz, plane itself is 13 oz. Sterling used 1/8" luan plywood instead of 1/16" birch for the front plank. I used Perfect streamline wheels, which I could go to modern RC light wheels. Just curious how you got it down to 7 ounces less?
You're right on the power for a light Ringmaster. That would take a careful selection of wood and finish. I'll have a similar problem on weight with the kit wood F6F Hellcat, aircraft is of the same proportions as the Ringmaster. For that I was going to the K&B .20 Sportster AAC Schneurle.