[python] Re: Lean steer trikes

I think the ultimate, and optimum trike design would be a tilting, delta
trike.  Whether it's a python front end or a twist chain FWD, I think
tilting is the answer - not tilting to steer, just tilting rear wheels?
Why?  Well, FWD makes for a tight, clean and much simpler and lighter drive
chain.  That's obvious.  Front wheel steering is much simpler and lighter,
and has less drag, than 2 wheel steering (ie tadpole).  Lastly, tilting the
whole trike measn you can move the CoG towards the inside of the turn if you
do it right, and that minimizes or removes the biggest problem with deltas,
and that is tipping on high speed turns.  Greenspeed, Fast FWD and Jettrike
are all on their way to that end, I think.  With a tilting delta, you don't
have the scary control issues - they corner just like a two wheeler.

Just don't confuse a "tilting trike" with "tilt to steer" - not the same
animal at all and a totally different set of considerations.

> Stefan wrote: Hi everybody, I've been searching for other types of  FWD
trikes and
> found this:
> http://www.freedomryder.com/FRH-1.htm
> No pendulum effect, but positive trail.
> Stefan
>
> This model is a standard delta trike like many handcycles, (Draft, Top
End, Schmiking, Wolturnus, Lightning,
> Greenspeed, Hall's Wheels, Varna, Principia) but Freedom Ryder do make the
Superbike model
> (http://www.freedomryder.com/Superbike%20LC-1.htm) which really is lean
steer with a self-righting effect. The axis
> is approximately 45 degrees with the pivot axis running through the centre
of gravity. Probably has positive trail,
> but they don't show sude views. It has been raced on the US handcycle
circuit for about 10 years, but the standard
> delta layout still dominates because lean steering requires some trunk
control to steer reliably. Alejandro Albor
> races a similar system with great
success,(http://www.awonalbor.com/thecompany.htm) but I think he's the only
one
> who can handle it (Double amputee), and even he has a reputation for
crashing a lot...
>
> All the best,
>
> Dan Chambers
> dan@xxxxxxxxxxxxxxxxxxxx

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