thickness of foam

[two stroke mick]

I am still toying with the idea of building a suspension seat. What I am wondering what is the minimum depth of foam one could expect to get away with and not causing problems

tsm

[Trimix]

That would depend on the foam. Not all foam has the same "squishyness". Also the spring and damping of your suspension system will have a big effect on how it feels.

Ive got some Ullman suspension seats. The actual foam on the seat is quite firm, but the damping and spring of the seat make the ride really comfy.

On Saturday I returned back from Yarmouth to Hayling in a bumpy f4 and sat down the whole way.

[two stroke mick]

trimix

what is the mounting height of the ulliman?

tsm

[Trimix]

I will have to measure them up for you. Till then you can have a look at the album in my profile for some pics.

Without measuring, they sit on some glassfiber pods that are about 40cm tall. The spring is a carbon fiber blade and the damping from some Oil / Gas struts.

Quite well damped, so there is no bounce, just bump absorbtion. Foam is very firm, but springs back to shape quickly.

[Shark Seats]

Hi Mick, our Jockey seats, or even just the suspension module may be of interest. A lot of R&D has gone into them so you may get some advantages there as opposed to starting from scratch.

Here is a bit of background:

http://www.rib.net/forum/f43/suspens...ing-76731.html

Cheers,
Dan.