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The power advantage enjoyed by the BL4 15 Series motors is due to carefully
shaped silicate-iron stators - which maximize wound copper and minimize magnetic
shorting between the plates - plus extremely powerful, optimally-shaped magnets
on the rotor. Kevlar sleeve on the rotor allows the BL4 16 series to turn up to
40,000 rpm continuously.
The internal resistance of the motors is identical to other 6-pole motors
in the same class, but the Kv is much lower due to the stronger magnets.
That's why the Warp 4 motor can turn a larger (or higher pitch) prop than
the competition at the same amperage and voltage. |
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