richohealey

it will spin at roughly the same speed for most props, it will just draw a number of amps reelative to the amount of work being done by the motor on the prop (ie how much air it's moving and with what force). what you need, friend is a watt meter. some high end multimeters will hanle those sort of amps, but don't bank on it. anyway, long story short it won't change much. what you should do is fly around with that prop as it is for a bit, with conservative throttle and see if the battery warms up. if it's getting very warm, or hot, you need a different prop.