Re: Wandering, Negative Steering Roll Radius?

[Huw Powell <human@nh.ultranet.com>]

> Bicycles, too, have it--assuming I understand the NSRR concept in
> automobile steering. With bikes it's determined by the rake angle of the
> front fork plus the "offset" of the hub ("offset" there being determined by
> the curved length at the end of the fork rather than any side-to-side
> offset as in the automobile's wheel). The rake and offset combine to place
> the bike tire's contact patch ahead (or behind) the point at which the
> steering axis meets the ground); and the variations make for more (or less)
> straight-ahead stability.

Isn't that caster?  Forgive me if I'm wrong... I thought the NSRR as
described meant the axis of steering rotation was "outside", as in
further from the longitudinal center of the vehicle from, the
longitudinal axis of the tire.  

the caster on a bike (or other veh.) puts the steering axis "behind" the
horizontal rolling axis.  

yes?

or do these two seemingly different alignment issues come down to the
same thing?  My head hurts now.

-- 
Huw Powell

http://www.thebook.com/human-speakers

82 Audi Coupe; 85 Coupe GT
http://www.nh.ultranet.com/~human