Guess the motors!
 

1) It's a 7XL, 73mm.
http://img408.imageshack.us/img408/33/dscn0728f.jpg

I thought it might be a Feigao?



And what is this one?

2) XL again
http://img339.imageshack.us/img339/604/dscn0730a.jpg

2nd one is a Feigao, not sure what KV it is or how to find out though?

1st one is also a feigao, just a finned can version.

The kv on the second one should be on that label- check under the heatsink clamp, but it may not have been filled in.

You'd need some sort of tachometer to check the rpms on any given voltage, then do a bit of mathe to workout the rpms per volt = kv rating. Im so old I cant remember the sum myself... :/

Bah, just take the rotor out and count the windings. :smile: