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Omar.M said:How high would this go? Is it possible to add any kind of control to it?
Secondly, those motors are pretty big and heavy? In that case, can I just use any old motor I find?
Omar.M said:Oh I see. I think that last one epilot showed would be the easiest to make.
I just had a question, since the faster the motor spins the more it should fly in theory right-- so why would you want to lower the RPM's?
I have two motors from those tiny RC cars, and I can probably create a simple IR transmitter and receiver for the previous one. Just one thing, how would it go higher or lower / move left or right?
Omar.M said:Sorry this might be a stupid question, but how does one find the resistance?
Omar.M said:I have about 2 of these motors:
Apparently they are above 10,000 RPM. So for these small motors, can I make the prop out of cardboard? What about gearing vs. non gearing?
If this is not efficient, I might just buy one good motor online-- shouldn't be too expensive. About the vertical control, when I press the button the motor spins, and when I let go it doesn't, so that is how it goes up and down, you mean?
epilot said:Well that is not so easy to be built I think. If you could make the whole propellers the same then you must consider the RPM for 4 motors (they must have the same RPM too).
If I was you and wanted to make something that just is considered to be HOVERed, I went and get some balas woods, put a low winding resistance motor (2 or 3 ohms) motor (a 4gr or 5gr, N20 or M20 is just fine), then get a GWS 2.5x1 prop( direct drive should be ok for an M20 or N20) and finally get a 3.6V lithium polymer cell (130mAh wich is less than 4gr for instance) and build this:
hack said:I like this design. I was actually working on a similar one last night and then I read this thread. Does the chassis act as a stabalizer or a "wing" inself?
My biggest question that I was pondering last night was how do I get the thing down. Up is easy, run the motor. Down though? (I am reasonably new to electronics) Naturally, you can cut the power, by use of a timer / counter or microcontroller - but that would just send it crashing down to the ground.
Would you want to reduce the voltage going to the motor to bring this device back to the ground gracefully? If yes - then how would you gradually lower the voltage? I was considering a microcontroller that (using transistors) would introduce loads in series to the motor gradually, thus lowering the voltage of the motor. Is there a better way to do this?
Thanks!
jpanhalt said:Model Aviation published a few years ago plans for a "penny model" that was a flying wing made from an egg carton and a penny for balance that flew quite well. John
The video of the Hydrofoam is here:jpanhalt said:I have seen a video of power boats flying