Technic 2009 - Differential gear

This new CAD-constructed differential gear is light, strong and wons the "Most Improved Award" in 2009. It is planned to produce it in a factory for quads, trikes, velotaxis and moonbuggys. It is designed by Christian Hein at the International Space Education Institute in Leipzig Germany.

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NX 8.5 Dual Differential Tank Drive
Modeled in Siemens UG/NX Modeling and Motion Simulation packages. Gears generated with the gear tool, treads assembled by hand. Simulation shows straight movement, a right-hand turn, left-hand turn, and a neutral turn.

Eaton Mechanical Locking Differential
Take an inside look at how an Eaton Mechanical Differential functions, and the advantages it brings to your vehicle.

Mechanical Principles (1930) by Ralph Steiner [4min selection]
This is my favorite 4min selection of a larger work by Ralph Steiner. The original was silent, and the DVD had it set to classical music. I have swapped the audio for an electronica/industrial track by 3 Liquid Hz - Little Boy. Favorite movements: @ 1:16 - counter mechanism @ 2:55 - normal gears, but cut to engage on diagonals @ 3:37 - SQUARE GEARS! @ 3:41 - variable speed transfer @ 3:46 - rotary to linear action with a 4 tooth cog Several users have commented that these gears may be on display at The Museum of Science and Industry in Chicago, IL.

DIY Pedal Generator for Electric Bike or Trike
A pedal generator for a chainless bike or human power - electric serial hybrid. Easy to build DIY project presented by Thomas Senkel. Free Plans for aluminum parts included. A Keyde front hub motor is used as a generator. It is nominal rated with 160 rpm @ 36 V and 250 W. You dont need any electronics, just a 3 phase bridge rectifier. The lithium ion battery is 12s (44 V) and 2x 25 Ah. The motor power is up to 5 kW. Free Music Archive: Graphiqs Groove - Deep Sky Blue