Difference between preload and stiffnes

[Astrolopitec]

Hi
On a clutch such as a Delta. Is there a difference between increasing the preload or putting stiffer springs ?

 

[Eoin70]

on a delta there is 9 different settings
3 sets of springs and 3 tension settings on each spring

 

[ex-racer#2]

Hi
On a clutch such as a Delta. Is there a difference between increasing the preload or putting stiffer springs ?

Just like a shock spring the clutch springs work in a range. If you drew a curve of resistance the preloaded one may have a initial resistance higher but then would work liniar after that. The higher rate spring would not only have a higher initial resistance to expansion but continue to resist at a higher rate. I am not at home so I can't draw comparison curves to show the overlap between a soft spring, preloaded soft and a higher resitance with and without preload. I would suggest trying the preload as it costs nothing and then adding higher "weight" springs as you continue testing. It may take a while. Also springs will "relax" or soften slightly as they are used for the first little bit.

 

[Astrolopitec]

Just like a shock spring the clutch springs work in a range. If you drew a curve of resistance the preloaded one may have a initial resistance higher but then would work liniar after that. The higher rate spring would not only have a higher initial resistance to expansion but continue to resist at a higher rate. I am not at home so I can't draw comparison curves to show the overlap between a soft spring, preloaded soft and a higher resitance with and without preload. I would suggest trying the preload as it costs nothing and then adding higher "weight" springs as you continue testing. It may take a while. Also springs will "relax" or soften slightly as they are used for the first little bit.

Thanks !
I undrestand your response perfectly.