Hello guys, just so you know I'm 15 and this is my first article, so please don't be mean if it's not much good. anyway,
Have you been thinking about getting into discus launch gliders, but don't want to spend $400 on a composite dlg or even the $80 for an alula? here's the solution: build one yourself! the techniques I used were fairly simple, and the wings are similar to the wings of the baby blender, but instead of making crease lines to allow the top sheet to fold over, the top sheet is skinned on the inside so that it can create a fluid curve.
the wings are 30" long each, with a 6" chord and a 1" control surface. fuselage is just made from a few pieces of foamboard glued together with a balsa hatch on top, hinged with tape and held down with a rubber band.The boom is about 24" long, and is made from a bit of scrap balsa. the tail is just simply cut from foam, and the pylon the horizontal stab sits on is the case from a 6-ch orangerx (could easily be done with a balsa rectangle if you don't have a 6ch orx.)
it uses 4 hxt900 servos (2 in the fuse that go back to the elevator and rudder, and 1 for each aileron. using a 750mah 3s lipo with a bec (would work fine with a much smaller battery, as it's pretty nose-heavy on this setup, but it's all I had laying around) for the battery and a frsky rx. it flies pretty well, launches are around 60 feet or so. If you guys want, I may be able to do a build video for version two (which will have a carbon boom and a more aerodynamic pod.)
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If you've already built a plane that glides in a reasonable way, they will fly easily with power. How about utilising radio parts from some other RC toy? But, yes Hobbyking could also be your source. Lots of their cheap stuff is made in China, and for $250 you would be able to buy half a shop-full of Chinese RC parts! ;¬)
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If I could be slightly critical though (with some aeronautical design and manufacture experience) it would be of the 'dirtiness' of the design. Those snake rod guides are in direct airflow and will very negatively affect lift and cause massive drag on something that has to be as clean and lightweight as possible. I would recommend a simpler solution that doesn't disrupt airflow as much like something either concealed or a lot slimmer. How has it flown, are the materials holding up to the stresses of dlg launching and is it light enough to sustain unpowered flight for any significant amount of time?
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