700KV motors

Discussion in 'Batteries & Power' started by Graydon Tranquilla, Mar 8, 2014.

  1. Graydon Tranquilla

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    I have heard many times that the more efficient motors are lower KV rated such as 400KV for lifting significant payloads..... and yet some of the big suppliers continue to sell Cinestar 6 and 8 c/w 700KV motors, i.e., QC3328 e.g.

    Why is that the case?
     
  2. Michael comissiong

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    Hi,
    I am not sure but I think that more power is needed to lift heavy loads but the higher kv is not as efficient as the lower kv there needs to be a balance between kv /mah/weight and prop size.
    I may be wrong
     
  3. Graydon Tranquilla

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    You r not going to get the optimum motor match for ARF kits. The objective is to get you in the air at a lower price allowing for some future migration path etc. to gain perspective on lifting capabilty you need to consider both motor momentum and torque. You must envision motor speed in line with motor torque. Look at motor speed/torque curves and work with ecalc for multirotors.
     
  4. Graydon Tranquilla

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    Also for optimum lifting efficiency, longer props have less drag when turned slower!
     

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