Quote Originally Posted by CatFan View Post
A battery can easily provide over 1000A. The CCA rating is the current the battery can produce and still maintain 10.5V, and the battery can produce a lot more current.

You aren't limited to 55lbs thrust by the single battery, you are limited by the large amount of current required to operate the motor at low voltage, which would mean a very large motor to withstand the heat. Increasing to 24V cuts the current draw in half, which allows the motor to be reasonable sized.
Thanks for clearing that up I should have indicated the current I was referring to is a constant current draw.