Product
Code: APP0006
Price: 4 USD ( Order Form )
Files: 4 movies (512 X 384 pixels). Each movie is provided in AVI and Quicktime format.
Description: These movies show a Simpson
compound planetary gear set, used in automatic transmissions.
It is made of two planetary gear
sets sharing the same sun gear (colored orange in the movies).
The green planet carrier turns together with the
green ring gear. Each movie shows a different transmission
ratio (see table below).
| Sun Gears | 24 |
| Planets | 12 |
| Ring Gears | 48 |
| Gear | Input | Output | Gear Ratio | |
| 1st | Yellow Ring Gear | Green Planet Carrier/Ring Gear | Blue Planet Carrier held stationary | 2.2 : 1 |
| 2nd | Yellow Ring Gear | Green Planet Carrier/Ring Gear | Red Sun Gear held stationary | 1.5 : 1 |
| 3rd | Yellow Ring Gear | Green Planet Carrier/Ring Gear | All parts turn together | 1 : 1 |
| Reverse | Red Sun Gear | Green Planet Carrier/Ring Gear | Blue Planet Carrier held stationary | -2 : 1 |
Related physics animations:
Planetary Gear Set |
 Cam |
 Compound Planetary Gearset (Ravigneaux) |
 Racks and pinion |
