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Here is an Ultimate Bipe powered with a dieselized .049 and covered with craft store cellophane. Pull / pull controls. I built the .60 sized Goldberg kit and made a few different sized planes from the originals.
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Spray the ink side of the cellophane with a light coat of 3M77 spray adhesive. Some seams that might get fuel soaked, it's a good idea to put clear tape over. It takes very little heat to melt through the cellophane so be careful.
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Dehavilan Dragon Rapide
54 inch span 26 ozs RTF [minus lug nut cargo in nose] pull / pull for elevator and rudder TD .049s fed from common bladder, but 1 engine would usually shut off several seconds after the other Model could knife edge all day and flew OK with just 1 engine. Covered with cellophane. It took about 5 or 6 lug nuts in the nose to make the CG where I liked it and to improve the glide, but it was flyable without the extra weight in the nose. |
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Last edited by combatpigg; Sep 28, 2020 at 10:57 AM.
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This is another "subject" where the idea for the plane came from a fellow forum member. What makes this 1/2A "Twin" a good bet for success is that the airframe is so large and stable in all axis...that an engine outage isn't going to cause a Death Spin that catches the pilot by surprise.
You don't need to worry about P Factor, counter rotating engines, etc. What you need is a large rudder with a lot of throw for single engine operation. The engines needed to be aimed with considerable down thrust since the thrust line is so low. That was pretty easy to dial in after the model was built. I fired up the engines and held the model loosely by the wingtips at the CG to see what the "pitch up" tendency was. |
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Last edited by combatpigg; Sep 28, 2020 at 01:03 PM.
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1/2 A Shrike with shrunken 7UP bottle cowl.
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SR 71
Norvel . 074s plane weighs 40 ozs Not enough rudder authority to counteract a single engine spin. I never took the time to correct that. Model flew good when both engines were running. |
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Ilyushin 4 Russian Bomber
same deal as the SR 71...not enough rudder to counteract a spin I hot wired the wing and fuselage out of foam, then cut the foam wing and fuselage into pieces so that the individual sections could be traced to make balsa ribs and formers. |
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Cool planes! Nice thing about small models...easy to roll your own; good work.
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During the final years of flying RC around here the trend was to see bigger and BIGGER STUFF. Flyers showed up with enclosed trailers with 1 or 2 giant scale, 3D gassers or giant war birds on board. I enjoyed the awesome show these guys provided and I think some of them liked seeing my tiny stuff fly. Is RC still going strong in your area...? |
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Our club has shrunk some, but we've still got a decent core who come out and fly every week. Electrics have become popular, but some of us still fly glow, and we even got a couple of electric guys into it, at least partly. Smaller stuff is almost all electric, though. Which is odd to me because I think the small engines are easy, run great, and make little mess.
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