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[on:]

hi friends.
i wana build Quad copter.
What rpm of motor will be necessary to fly aroung weight 500gm.
and how could we change the direction of Quad copter (with four propailler.)

[Reply #1 on:]

That looks like a question for a quad copter forum.

[Reply #2 on:]

What rpm of motor will be necessary to fly aroung weight 500gm.

Which RPM of which motor with which propeller? RPM alone is not sufficient to answer your question.

You've got a lot more research to do before RPM is even a consideration.

[Reply #3 on:]

3000 rpm motor, prpaillor no idea we cant get that kind of material in nepal, so i have to make it my self.
give me the struture, no.f blades that would be better for my project.

[Reply #4 on:]

I think you have two props rotating CW and another two rotating CCW, which cancel out the spinning motion - you slow a pair down to rotate in one direction, and the other pair to rotate the other direction.

That's only a guess though. I might be completely wrong!

As zoomkat said earlier, a quadcopter forum would probably be a better place to ask.

[Reply #5 on:]

thanks for suggestion