Gearsensor - for crank drives

[shemozzle999]

http://gearsensor.com/photos


also a version from Tranzx:

http://www.chinae-vehicle.com/index.php?c=product&a=view&id=421

 

[shemozzle999]

On further investigation into this device it appears that the distributors of these devices are www.e-totem.org based in Czechoslovakia.

It cuts off the motor during gear changing thus protecting the transmission chain and can be wired in parallel with the brake cut-out or fed directly into a specially designed controller.

I wonder if they would supply samples for testing?

They also sell e-bikes:

http://e-totem.org/trekk-e-bikes/rocket/

available/pricing from:

http://translate.google.co.uk/translate?hl=en&sl=sk&u=http://www.ecyklo.sk/&prev=/search?q=www.ecyklo.sk&client=firefox-a&hs=z0F&rls=org.mozilla:en-USfficial&channel=rcs

 

[trex]

the cure may be worse than the problem. It took me only a few tries to learn to reduce power before changing gear. Wiring in this sensor is not easy as the cabling needs to be watertight. A better design would incorporate the gear change signal into the controller like the Xiongda XD. Best solution is to have a clutch built into a hub gear.

 

[shemozzle999]

They do think about the wiring problems on their kits and have come up with this solution:

www.youtube.com/watch?v=1_4wg5wcUXM

or do away completely with a chain

www.youtube.com/watch?v=AAvWD23nHBU

 

[Croxden]

or do away completely with a chain

www.youtube.com/watch?v=AAvWD23nHBU

I like the stringbike idea, I'm all for something different. But just think what the vandals could do if you left it parked for a while. Could it be carbon fibre string?

 

[flecc]

or do away completely with a chain

www.youtube.com/watch?v=AAvWD23nHBU

Vandals and bike haters would love this one, one snip, kaput!

P.S. Crossed with Croxden's post above.

 

[peerjay56]

The theme from 'The Persuaders', followed by 'Six Million Dollar Man'. They will certainly have some persuading to do, especially if being bionic is a requirement!