2WD idea

 

<thinking> ... I wonder if I could design and build a 2WD system
for Dnepr#2 that is simpler than the Ural arrangement using
a special differential ... how about 3 rear sprockets.

The inner one (#1) would be driven by chain from the transmission
as usual. The outer rear sprocket (#2) drives a 2nd chain which drives
sprocket #3. It's located a bit forward to line up with the sidecar
wheel, which is driven by a shaft connected to #3.

Sprockets # 2 and 3 need to be of equal diameter, but not necessarily
the same as #1. In fact they'd probably be smaller because
the offset to the sidecar driveshaft is short.

Because there's no accommodation for differing rear wheel speeds
in turns this 2WD would be used only in slippery conditions
such as snow or mud. I'd also need to design a convenient
disconnect for the sidecar wheel.

SQ

 



You're getting *weirder*, you know.



Split link in the secondary chain would do that.

--
BMW K1100LT  Ducati 750SS  Honda CB400F  Triumph Street Triple
Suzuki TS250ER GN250  Damn, back to six bikes!
Try Googling before asking a damn silly question.
chateau dot murray at idnet dot com

 

Sean_Q_ wrote:

       An electric clutch could solve the connect/disconnect problem.

 



But it would consume too much power.

A small motorcycle clutch on a shaft driving the sidecar wheel would
work just fine, because it probably wouldn't have to handle more than
20 horsepower...

It could be manually disengaged by pulling the lever into a detent
position.

 

Aham Brahmasmi wrote:

      I didn't spend much time looking.  The few references I found put
the amp draw at about 4 amps.
    Centrifugal clutch maybe?   Would one automatically engage if the
bike wheel was spinning and the sidecar wheel just sitting there looking
silly?