What diameter prop for Feigo 7s on 7.4v ?

[Andris Golts]

Hi all i have a 22 1/2'' mono sitting around that i raced in the late 90's in the 8 cell mono class with a 11 turn brushed motor hull c/w hardware weights 20 oz set up direct drive with a Hughey .098'' flex cable with 1/8'' stub shaft . My Feigo 7s 5070 kv motor fits perfectly for battery im using a pair of thunder power 2100 mah 7.4v 25c lipo's wired in paralell to provide 4200 mah . What diameter prop would be suited for this set up? What is the largest diameter and pitch prop i can use? Regards Andris Golts.

[Fluid]

That's a lot of rpm. I'd use props like an x432 or x632. That tiny cable can't take much abuse.


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[kendt]

Ya I agree. Thats sounds like a disaster waiting to happen. Is it a flex shaft or a wire drive. Big difference in torque when changing from brushed to brushless.

[Andris Golts]

Thanks for the great information i will change to the 1/8'' flex cable.Regards Andris Golts.