Maiden flight

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Wing, part 1

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Before setting out to build this plane I decided to make some changes and adapt it to the 4-channel plane I want. It is going to be equipped with an electric motor rather than a glow-plug 0.049 engine, and I have some modifications planned for the fuselage. The wings will be equipped with ailerons to make it a true 4-channel model. The original kit had an optional add-on aerobatic aileron-wing with a semi-symmetric profile and no dihedral. The wing I decided to build will have a ~3 degree dihedral and wing-length ailerons. To accommodate the ailerons I made some minor changes to the trailing edge seen in the picture, and printed a rib template from PLA on my 3D printer. The trailing edge spar I used is actually 1/4"x3/8" and not a 1/4"x 3/4" as in the picture. I cut each rib using the template, which was my first mistake. It takes too long, and if you're not careful to check each one they may not match. A better method would be to "sandwich" rough-cut
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Wing, part 3

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The last step before final sanding and covering was to fit the wing with ailerons. The ailerons run the entire length of the wing, and have a width of approximately 12% (1/8) of the wing cord. The ailerons are fitted with two nylon hinges, and are actuated by a steel rod. Next step is a thorough sanding of all surfaces, then covering the wing with Monokote. The ailerons will remain in natural balsa, sealed with Dope or Sanding Sealer.
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Completed

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After eight weeks the Electric Banana is complete and ready for a maiden flight. AUW: 620 gr / 22 oz and powered by a 1300 Kv motor, 30A ESC, and a 3S LiPo/2,200 mAh battery. Wing span of 38 inches and a wing cubic-loading of 10.6. Power measurements with an 8x6 propeller showed a maximum full-throttle input power of approximately 140W. Assuming an efficiency of 80%, would yield about 110W maximum. According to my calculations this is more than sufficient for a basic 4 channel training and some aerobatics. Some pictures after an outdoor taxing test.
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