low and high speed damping

[Apricot Slice]

Hi all,
Does anyone have an interest in hi and low speed damping?
And got any ideas why manufactures have not come up with anything yet?
Apricot Slice

[mole2k]

Our shocks at the moment have adjustable high and low speed damping... ?

[Apricot Slice]

Originally Posted by mole2k

Our shocks at the moment have adjustable high and low speed damping... ?

err.. is that a question or a statement?

[crashingbird]

Originally Posted by Apricot Slice

Hi all,
Does anyone have an interest in hi and low speed damping?
And got any ideas why manufactures have not come up with anything yet?
Apricot Slice

I think it's been done yet, RPM used to make "2stage dampers", and at the moment there's the popular high end brand GHEA, who makes the 'tapered pistons' for several 1/10 en 1/8 kits, for the same purpose (low in, high out)

http://www.rpmrcproducts.com/faq/pistons.htm

http://www.ghea.se/index.php

http://www.oople.com/forums/showthre...t=29087&page=5

[mole2k]

It's a statement, the question mark was in case I had picked up the wrong end of the stick and you had meant a difference in the car speed or something like that.

Any r/c shock out there reacts differently in high speed and low speed damping due to the laminar and turbulent flow of the oil.

[Apricot Slice]

I have seen the rpm pistons. you can use them as they state in the instructions to give more damping on the bound stroke and less on the rebound. this will help out on landings from big jumps. It will not improve handling though.
Fitted up side down it would act like typical low speed damping on a full sized car shock.



""It's a statement, the question mark was in case I had picked up the wrong end of the stick and you had meant a difference in the car speed or something like that.
Any r/c shock out there reacts differently in high speed and low speed damping due to the laminar and turbulent flow of the oil. ""

Yes, of course. the flow of oil passing through an aperture at different speeds has different reactions.
Take for example a B4 shock, or even a Tamiya Hotshot shock absorber which has a valve in it.. its all low speed damping.
Please take a look at the link to understand better the term high and low speed damping.
http://www.blackartdesigns.com/id4.html

[James]

A few have tried staged springs also, thats never really seemed to catch on though.. yet

[The Pookster]

Nothing about at the moment that I know of that allows you to tune high and low speed damping independently.

There are pistons about that allow you to adjust bump and rebound independently, such as Ghea and RPM.

I'm just starting to work on this for the RC world starting with proper damper dyno characterisation of all the current different damper pistons out there, will take a while to get results.