"John Doe" wrote in message
...
I have a Bosch 36 V lithium-ion hammer drill motor with batteries
and charger. What sort of propeller would be appropriate to stick
onto the shaft of that? Would a powered paraglider propeller be
too big? I just want to get a rough idea of how much air that
motor can push. Any experienced/educated guesses would be
appreciated.

You need to know some more things to be able to guess.

Need to know how many RPMs it turns.

Need to know how much amps it pulls at what HP level. You can make a
dynamometer by putting the motor on a stand that has a lever on it that will
lift some weight a certain number of degrees, which will allow you to measure
torque. Put a dummy prop on it that will put a reasonable load on it.

Lacking that info, or a motor number, NFI.
--
Jim in NC