Thread: Fisher Price Spec?
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Unread 19-01-2004, 15:34
Andy4Hawks Andy4Hawks is offline
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Re: Fisher Price Spec?
Okay so I've done some experimentation and a little reverse engineering. It appears that the 2004 Johnson Electric Fisher Price motors have a free speed of about ~10000 RPM. You can check my experimentation (I used a digital dc power supply locked at 12.0 volts) , but the gear box has a ratio of around 124:1 and my counter on the output sline of the trans picked up ~75 rotations per minute. I linearly approximated the free speed based on the current ratios w and w/o the transmission and came out to ~10000.

Our team is very interested in using the FP motor in our drivetrain this year. Since Johnson doesn't put the pinion gear on the motor I'm guessing Paul's spec sheet won't give us any info, does anybody know what the gear type is on the FP motor?
Last edited by Andy4Hawks : 19-01-2004 at 15:38.