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scratch building a heli

Old 11-26-2007, 11:41 PM
  #1  
K_Tar
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Default scratch building a heli

Hi all,

im on a new project and need some help please:

- what are the motor ratio between the main and the tail gears.

- what gear ratio should i have on the main and according to that what should be the tail rotor motor and gear ratio.

what is the wing loading on the blades and what tail prop size should i use,

or if you know of any sute that i can read all info and tips on basic heli design.

thnx in advance

K. Tar
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Old 11-27-2007, 01:17 AM
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GreenAce92
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Heres a good website some fellow wattflyers showed to me. Also heres a link for diskloading and stuff but i think this is for real helis not sure. I think rotor rpms to tail rpms is like 1/3 and the main rotor blades depending on the size of the blades is like 1/80-100.

http://www.dream-models.com/eco/flying-index.html

http://www.heli-chair.com/aerodynamics_101.html

i have been looking into doing the same type of project you have im still researching.

Good luck
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Old 11-28-2007, 10:02 PM
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K_Tar
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thnx Green for the great info, the software seems great and worth more than free lol. lots of info i didnt know there. what are u planning to build is it a micro or a medium heli ??

Cheers,
K. Tar
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Old 11-28-2007, 11:32 PM
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GreenAce92
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Probably a micro something like 10in wingspan maybe 15. I wont be building now im still an rc plane guy although i will buy myself a Picoo Z but im still learning tx programming and im still learning about rc helicopters. Just look around check the RCU forums and RC Groups they have some good stuff there. You should message tahustvedt he builds submicro helis he should help you out.

Good luck.
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