This animation shows 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). Number of teeth: Sun Gears 24 Planets 12 Ring Gears 48 1st Gear: Input: Yellow Ring Gear Output: Green Planet Carrier/Ring Gear Blue Planet Carrier held stationary Ratio: 2.2 : 1 2nd Gear: Input: Yellow Ring Gear Output: Green Planet Carrier/Ring Gear Red Sun Gear held stationary Ratio: 1.5 : 1 3rd Gear: Input: Yellow Ring Gear Output: Green Planet Carrier/Ring Gear All parts turn together Ratio: 1 : 1 Reverse: Input: Red Sun Gear Output: Green Planet Carrier/Ring Gear Blue Planet Carrier held stationary Ratio: -2 : 1
If you want to add your voice and contribute to this existing news event, use the event code
(Event Code: @13081587), that you will find on each news event page, as the first word of the
SMS or MMS message followed by a space then add your contribution (text, image or video). For example:
@13081587 This is an amazing video of Greg Norman hitting a hole-in-one in Sydney, Australia.
The first word of the message should be @13081587 (event code), to make sure the system attaches
your voice to the right news event.