jeffk464

I am building a mouton 1600 from cmp and need to know what size prop to put on my motor. I dont plan on using a gearbox and the motor is a B20-40-15L Hacker-Compatiable 3800 Kv/RPM Inrunner Brushless Motor like this one here from Xheli = http://www.xheli.com/b2ha38kvinbr.html
Somewhere I got the idea that a folding 10x6 from APC would be the right match.

P.S. I know almost nothing about electrics, please help.

Bad_Daddy

At 3800 kvm, I'd suggest something in the 5X4 range if you're not going to use a gearbox. A 10X6 is something you'd run with a motor in the 1200 - 1400 kvm range. Otherwise you'll be pulling more amperage than that motor can take. Take a look at the Hacker website, for their specs, they suggest that prop if you run a 4:1 gearbox.
http://www.hackerbrushless.com/motor...plication.shtm

jeffk464

Ok, I see what your saying the speed 400 props are all around 5X5