Re: [ST] Suspension upgrade (was: Sprint ABS)

[Neil Lindsey <Neil.Lindsey@xxxxxxx>]

I look at it this way -- picture a sine wave -- spring rate affects the
amplitude (up and down movement) and damping effects the frequency (and
thus how many oscillations occur before it stops)

works for me anyway, but YMMV


----- Original Message ----- 
From: "Emile Nossin" <Emile@xxxxxxxxxx>
To: <ST@xxxxxxxxxxxxxx>; "'Matthew Heyer'" <matthewheyer@xxxxxxxxx>
Sent: Tuesday, February 14, 2006 5:48 PM
Subject: Re: [ST] Suspension upgrade (was: Sprint ABS)


> >From: Matthew Heyer
> >Progressively wound springs do not act with damping effect. Where the
> >similarity might arise is that when riding hard. A progressively
wound
> >spring just changes the actual spring rate as it is compressed.
Softer
> >initially, and then stiffer the more the spring is compressed.
Damping
> >is completely different in that it works to impede either the
compression
> >or rebound of the spring.
>
> Well, I know that they are different things. But does the change in
spring
> rate on its own not provide a retarding / impeding effect on the
compression,
> just like an oil orifice does for a constant wound spring? The higher
the
> force on the spring (speed of approaching / departing terrain), the
higher
> the resistance of the spring or oil density. Right? I mean the oil
determines
> with what speed the compression changes, but a change in spring rate
also
> changes that speed in a similar fasion... doesn't it?
>
> A similar thing I read here about multi-leaf springs, which also
progressively
> change spring rate with compression:
>
http://transport.tuthill.com/Reyco_Granning/reyco_granning-susp-basics.htm
> "The multi-leaf spring has a rudimentary ability to increase damping
with load,
> due to an increase in inter-leaf friction."
>
> Emile
> www.piloot.com




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