Good Motor for over 120+ MPH - RC Groups
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Oct 30, 2017, 09:16 PM
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Good Motor for over 120+ MPH


What a good motor that I can use for my Wing Warrior E-Slayer 48" wing that will push it over 120 MPH and have unlimited vertical. Something that can handle 6S lipo and a 5x5 prop.
Last edited by RBYM; Oct 30, 2017 at 09:41 PM.
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Nov 09, 2017, 12:07 AM
The 6 P principle works for me
elecfryer's Avatar
Quote:
Originally Posted by RBYM
What a good motor that I can use for my Wing Warrior E-Slayer 48" wing that will push it over 120 MPH and have unlimited vertical. Something that can handle 6S lipo and a 5x5 prop.
Well........looking at it from a numbers (rpm) point of view........

If at full throttle on the ground you have a (prop) pitch speed of 125 mph, 125 / .000947 (a constant) = 131,995.
131,995 / 5 (pitch of the prop) = 26,399 rpm
assuming you are running at about 70% efficiency (static, on the ground at full power on 6S lipo) the kv of the motor should be about 1700
if the loaded voltage at full power is 22.2V (3.7 volts per cell at full load) 26,399 / 70% = 37,712 and 37,712 / 22.2V = 1699 KV.

So, I think you are looking for a motor with a KV of about 1700 THAT CAN HANDLE THAT MUCH POWER.
I think you are looking at well over 1,000 watts.

Just a start of course. Hope it helps!

Michael
Nov 09, 2017, 11:35 AM
Registered User
Thank you!
Nov 11, 2017, 10:09 AM
Ft Lauderdale
Number_6's Avatar
https://hobbyking.com/en_us/turnigy-...___store=en_us

Probably heavier motor than you want,
but I use this motor with 100 Amp ESC,
on 6s, for 142mph bursts with Grim Reaper,
pusher motor.



I got the idea from this:

http://rcfoamfighters.com/Models/FF-...-SuperNova.htm

Probably still the 'cheapest' way to go way past 100 mph.

I didn't reverse shaft, just made custom motor mount.
Last edited by Number_6; Nov 11, 2017 at 10:15 AM.
Nov 12, 2017, 12:50 AM
Registered User
Thanks!


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