Simon Brooke must be edykated coz e writed:

Richard Corfield writes:

In article , Clive George wrote:

I don't think we ever lost the front chain, but it was quite tight. I wonder
if this was a factor in the way the drive train felt like pedalling through
treacle.

I found it was a balance between that, getting it slack enough not to feel
like treacle, but tight enough not to bounce off. On a perfect race track
there'd be no problem at all. I also wonder how older Sturmey Archer or
fixed gear bikes handled it, as I don't remember the problem as a child
on that kind of bike. Maybe the chain run was shorter on these. I think
some sort of spring tensioner, even maybe a rubber bush of some kind
on the pulleys on the return side, would make it easier to set up. Once
set up, it wasn't a problem.

Would the jockey arm off a rear derailleur, either without the
pantograph or with a fixed pantograph, do the job?
At some stage I seem to have missed which Trike was used, Greenspeed
perhaps?

--
Ian

http://www.catrike.co.uk