As far as Kv, if you have a drill (prferably a drill press) a tach and an AC volt meter, you can figure out the Kv. Hook the motor to the drill and run it at a constant speed. Use the tach to get the speed and the volt meter to read the voltages from the three phases. There's a formula to calculating the Kv from the RPM and voltage generated, but Ken Meyers has developed a spread sheet to do the math. Here's a link to Ken's instructions with the spread sheet <
http://www.theampeer.org/Kv/kv.html>.
Ken also has a rule of thumb for input power limits for outrunner motors based on weight. A good estimate is between 1.5 watts/gram and 3 watts/gram.
Those two sets of numbers, the Kv and the input power range, should get you n the ball park with any outrunner motor.
- Roger