This is the Great Planes ElectriFly ammo 28mm gear drive. This bolts directly to the ElectriFly brushless motor mount.
Requires: Attaching to the motor mount
Length: 2.4" (60.9mm) approx.
Width: 1.4" (35.5mm) approx.
Motor output shaft dimension: 3.175mm
Prop adapter shaft dimension: 5mm to 5/16-24
Gear ratios included: 2.5:1, 3.1:1, 3.6:1, 4.5:1, 2.1:1 with 16T pinion and 40T spur, 3.1:1 with 16T pinion and 50T spur, 3.6:1 WITH 11T pinion and 40T spur, 4.5:1 with 11T pinion and 50T spur
Weight: 1.2oz (34g)