---
title: Fisher Price Motor
tags: [obsoletemotor, obsolete-part]
---

{% include outdated-warning %}

Stall current (amps) | 64<br>
Stall torque (in-lb) | 5.72<br>
Max power output (watts) | 390<br>
Free speed (rpm) | 16000

Fisher Price (FP) motors and gearboxes were included with every [kit of parts](kit-of-parts) from 1999 through 2012. The FP is the second most powerful motor in the kit of parts. The FP is taken from a Powerwheels (tm) car where it powers one of the wheels.

## Included gearbox

The included gearbox is the same one that is used in the Powerwheels (tm) car. It has a ratio of approximately 188:1\. The gearbox uses plastic gears, but it is relatively reliable and not known to strip gears. It has a non-standard output shaft consisting of a open-ended cylinder with 10 slots cut into it. It mates with a spool-shaped piece with spokes matching the slots.

[[edit](/index.php?title=Fisher_Price_motor&action=edit&section=2 "Edit
section: Torque and Efficiency curves")]

## Torque and Efficiency curves

* The torque of the fp motor is .45 N-m at stall
* With gearbox: 2.25 N-m
* Without gearbox: .45 N-m

## Usage Notes

The Fisher Price has by far the highest power density of any of the KoP motors.

The 2005 KoP included a Fisher Price motor designed to operate at 9 volts, instead of 12. Consequently, it is very easy to burn out because it creates such large amounts of heat in such small volume/mass. Be sure to design a mechanism using a Fisher Price so that the motor never approaches the stall torque. A good rule of thumb is to design for 1/4 the stall torque.

## Kit of Parts

### 2012

Two Fisher Price motors and gearboxes were provided in the KOP.

### 2011

One Fisher Price motor and gearbox were provided in the KOP.

### 2001-2010

Two Fisher Price motors and gearboxes were provided in the KOP

### 2000

No data.

### 1999

The Fisher Price motor makes its debut in FRC. One motor and gearbox were provided in the KOP.