MFA Como Drills 920D kit to make up the geared motor with the following possible ratios / output speeds (rpm) at 1.5V & 3V
4:1 / 1150 / 2300
16:1 / 287 / 575
64:1 / 72 / 144
256:1 / 18 / 36
1024:1 / 4 / 9
4096:1 / 1 / 2
MFA Como Drills 920D kit to make up the geared motor with the following possible ratios / output speeds (rpm) at 1.5V & 3V
4:1 / 1150 / 2300
16:1 / 287 / 575
64:1 / 72 / 144
256:1 / 18 / 36
1024:1 / 4 / 9
4096:1 / 1 / 2