Experiment first without the propeller and rubber band.Thanks. Here are 2 pics
Hello. It is normal that they tend to nose dive (if no too much of course).Trying to understand the theory of flight. Hence, got a few balsa wood rubber-band kits and a trying to fly the, not much luck. They tend to nose dive. Any help/suggestions appreciated.
Actually, it doesn't. A perfectly flat wing at a positive angle of attack will provide lift; albeit not as efficently as a cambered one.To do this is has to have camber profile, i.e. curvature in the wing's profile.
That was proven with the Tacoma Narrows bridge, that wasn't even part of a airplane. https://www.simscale.com/blog/2018/07/tacoma-narrows-bridge-collapse/Actually, it doesn't. A perfectly flat wing at a positive angle of attack will provide lift; albeit not as efficently as a cambered one.
Can you show a video of this workingHello. It is normal that they tend to nose dive (if no too much of course).
Look: it takes off not in a straight line, like from cannons, but in tacks. At the same time, at each turn, the elastic is again stretched due to the inertia of the airframe. The idea is that the glider serpentine rises higher and higher, and the elastic band remains stretched, about the possibility of having a dynamo start. The main thing is to choose a soft enough rubber so that the overclocked model can stretch it again.
If the problem still persists then try this: maybe the elevons are too small for the profile you have chosen. They need to be made 3-4 times larger in area in order to be able, by lifting them slightly up, to give the profile the desired S shape to ensure longitudinal balancing. Most likely, the center of gravity of your airplane wing is much ahead of the focus (the center of application of the lifting force). Therefore, the wing lowers the nose. To ensure balance (so that the nose does not fall), an S-shaped profile is used on the wings, or this S-shaped profile is created due to raised elevons, the length of which is the entire trailing edge, and the width of which increases from the center to the tips. The simplest solution is to fix the existing elevons and attach new ones, for example from balsa. And recalculate the position of the CG again, for new sizes.
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