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05-18-2020, 10:32 PM | #1 |
RCC Supreme Contributor
I am: John Dutkoski
Join Date: Dec 2002
Location: Toronto, Ontario
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Spectrum # of RCs: 10+
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Posts: 2,157
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Reaction 64, design and build
I pretty sure everyone has heard of the BTE Reaction 54 turbine model, a fairly older all wood design, new versions have a iberglass fuselage, but I prefer the looks of the wooden one. Anyway, I need a quick build 90 mm EDF model to use the new six cell batteries I just purchased. So, after looking at numerous plans on the net, decided to redo the Reaction 54. I did some figuring with penscil and paper ( yeah, old school ) and decided on a 64 inch wingspan and 64 inch overall length.
I used the basic two view provided on BET's website as inspiration and started to do the design work. Never liked the way they designed the rear fuselage, with the turbine hanging in the breeze, so I will enclose that area so the EDF and thrust tube will be inside. I will also design cheek intakes to feed air to the EDF. This will be done once I have the wing and fuselage made so I can get the proper shapes and angles. The fuselage was also widened to accommodate the EDF unit. The original had simple builtup slab horizontal stabizer and vertical fin, I will be hotwiring versions with an airfoil. Even when the model is reduced in size, the wing is still huge, the root is 20" long and the wingtip is 12". I think it'll be a floater if I build light enough. I also used a different airfoil than the BET's model, it's a NACA 0009 symmetrical design. The fuselage will be all flat extruded foam, 1/2" for the sides, 3/8" for the top and bottom. There will be some plywood in the structure but only where needed, most formers will be foam. For controls, aileron elevator, rudder, flaps and yes, retracts, jets need retracts. For covering, it'll be 3/4 oz fiberglass cloth, bonded in place with water based urethane paint. Not sure about the colour scheme, but you can bet it won't be pink for long. To determine the location of the CG, I decided to make a chuck glider. So, after supper, printed out a half size of the model and cut out the parts from dollar store foam, took almost two sheets, so, $3.00 investment. While assembling it, I discovered a 50 mm EDF will fit inside it very nicely, hmm, another project for sure. One thing I'm not sure about is the location of the wing, I might move it forward slightly, to help with balancing. But will wait and see if the chuck glider works. So, here is my evening's efforts, turned out pretty good for $3.00. |
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