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Discussion
Trex600 CF Scale motor choice
I have a TF Model/Smart Model Cobra I am wanting to build and the mechanics are the HK 600 (Align Trex CF clone). It does have lower side frames so motor space is reduced than the normal frames.
What are the thoughts of using a Scorpion HK-4025-630 in it for power? Will this work or need something different? Need a different KV? Plane on using a two blade flybar head on it. Thanks for the help. |
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Are you planning to run at 12s? If not the motor would be very low kv, even for scale. You could run a larger pinion to get the head speed up although, even with a 17t pinion, you’d still only have a max head speed of about 1300. Flyable, but not much margin for error. If you’re planning on running 6s this motor would work very nicely. https://www.altitudehobbies.com/coll...otor-600-class I run these suppo motors in my 550 and 600 helis with no issues. Very good quality. Quite a bit cheaper than a scorpion too.
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Last edited by Dallas17; Jul 11, 2020 at 03:41 PM.
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are you planning on using stock 6S battery? if so, the 630KV motor you are considering is too low, your head speed will be around 1000rpm, less as the flight continues and battery voltage drops.
the CF600 has 170T main gear and 10T pinion. the pinion is small because the original motor KV was high. I would go with at least a 12T pinion for better mesh, especially with these tiny 0.7M gears. depending on your desired head speed, you probably need somewhere around 1000 to 1200KV for use with 6S lipo battery and 12T pinion. also make sure your motor fits between the frame plates. the spacing is 47mm. you can use a head speed calculator like Mr Mel to help you: http://calc.kfmconsulting.se/ |
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