Planetary Gears
Explore reduction, overdrive, reverse and direct drive in one planetary gear set.
A simplified teaching model.
Hold ring · drive sun → carrier output
Speeds for an input of 1
Sun: 1.00 · Ring: 0.00 · Carrier: 0.30
(30 + 70) × ωc = 30 × ωs + 70 × ωr
How to play
Choose a mode, then use Auto or Step. Negative speeds indicate reverse rotation.
Learn more
This example has 30 sun teeth, 70 ring teeth and 20 teeth per planet. Automatic transmissions combine planetary sets, using clutches to connect parts and brakes to hold them.