Hacker B20-15L 4:1 GB

[eitanro]

In the Hacker web there is no info on the max Amps of that motor, prop range...
When I sent E-mail to Hacker, I recieved back mail that this E-mail doesn't exict!
Can you tell me please, what is the folding prop range for this motor?? max amps?
Thanks,
Eitan

[kyna]

Dear Eitan,

You can find the max amps of all of our motors on our website at http://www.hackerbrushless.com/drivesystem.shtml. I do not recommend using larger than a 10" folding prop on a B20. The actual prop size would depend on your application.

Best Regards,

Kyna Veatch
Hacker Brushless USA

[jfrickmann]

Question: Why is max current the same for e.g. B20-18L and B20-12L?

I would have expected that the 12L could take 50% more current than the 18L?

Thanks,
Jesper

[kyna]

Dear Jesper,

The current limits are standards based on the actual size and mass of the motor. A B20-12L would run a smaller prop at higher speed and a B20-18L will run a larger prop at slower speeds. The reason for this is some models require a high speed propellor and others require a high thrust propellor system.

B20-12L for high speed pattern/warbird and a B20-18L for 3D hovering/slow speed aerobatics.

Best Regards,

Kyna Veatch
Office Manager
Hacker Brushless USA

[jfrickmann]

OK, thanks.

I was thinking that I might be able to run the 12L on 2S instead of the 18L on 3S LiPos, with the same prop.

Best regards,
Jesper

[mstone]

Hacker published all the specs in their lastest catalog.

http://www.hacker-motor.com/images/Catalog06/Hacker-2006-Page-14-15.pdf

Mark

[jfrickmann]

Thank you sir! That makes sense, and it looks like the 12L would work fine with 2S LiPos and a folding prop.

Best regards,
Jesper