This powerful little motor is well under half the size of a Mini-EV. And of course, this motor is fully reversible. It also has two 2.5mm mounting holes on the face, which are exactly 25mm apart, as well as a splined shaft which makes mounting a gear to it easy.

Robert Woodhead has done some extreme testing with this motor that he has documented here.

Speed :	16,000 rpm @ 12V
Angular velocity constant:	1560 rpm/V
Amps @ nominal:	1.2 Amps
Efficiency:	71.4%
Peak Power:	0.36 hp
Stall current:	91.8 A
Stall torque:	78.7 oz-in
Weight:	7.50 oz (213 grams)
Diameter:	36mm
Length:	65mm
Shaft diameter:	1/8" (3.2mm)
Shaft length:	11/32" (8.8mm)

Rhino v2 File  Specs  Extreme Testing Documentation

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5/7/2009 Richard	dc motor: Johnson This motor is great.Perfect for driving twin screw props.Mounted easily in wtc to deliver the torque/power.(12 volt dc)