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They get hot easily
The only down side about the F-P motor is that it tend to get hot really fast. Just look at the size of it, and think about how much surface area for heat to excape.
Besides, people tend to use the gearbox that came with the motor, and the plastic gears inside that gearbox tend to break under high load. Although, that won't happen too easily if you use it right.
A lot of team use the drill motor because they want to use the drill transmission to shift gears, which is pretty easy to do with a servo or pneumatics, whereas the fisher price will need a custom gear shifter.
Over all, Drills and Chiaphua's are still the most powerful motors in the collection. They can take the heat better than the FP, so why not let them be the toasters, and have the FP power a really strong arm or a high speed ball mechanism.
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