gearbox

[luckyme]

descibe an application of a epicyclical gear box

[Clanad]

Pratt and Whitney (Canada) manufacturers PT-6 aircraft turbine engines for aircraft applications. P&W utilizes an epicyclical reduction gearing system to reduce power shaft output RPM's of around 36,000 to a useable 1900 to 2200 for propeller drive on numerous aircraft turbopropeller powered aircraft...

[deggers316]

go to a web site called "how stuff works"its excellent

[woodchopper]

http://en.wikipedia.org/wiki/Epicyclic_gearing

[oldrenders]

Old Sturmey Archer 3 speed "in-hub" cycle gears. Also now copied in China, Japan etc etc.