gas volume in a shock asorber

[Mr Revhead]

anyone have any idea how much gas is "typically" in a shock asorber?
i can find the pressure, now i need the volume....


sending shocks overseas on NZPOST is a drama.....

[RomanV]

Couldnt you just measure the length and circumference of it, to get a rough (good enough?) idea?

[Mr Revhead]

ah... no.

shocks arnt totally gasfilled, they are oil filled.
the gas is there to keep it under pressure and avoid foaming.
so only a small section is filled with gas

[bad20v]

wat vehicle are they from?

[Mr Revhead]

uzs131 airbag struts.
rears.

[atmosports]

Generally I've found most competition type shock units, either with or without remote cannisters have between 20-100mm of their length as gas with a 45-50mm piston so you do the maths on that. Road shocks generally are smaller diameter etc so would probably have a lil less volume, but it's kinda hard to measure as most factory shocks are sealed & you have to cut them to get them open & as soon as you cut through the gas disappears before you egt a chance to do any sort of measurement on it.

[Mr Revhead]

yeah i figured it would be a tiny amount.

seems the pressure limit for shocks on airplanes is 280 bar
and a volume of 1.6 litres
you multiply the volume in litres by the bar and if its over 80 its no go

seeing as the highest pressure i could find on google was 360ish PSI... i cant see many shocks not being exempt


bloody beuracrats

[Adamal]

Just fill it out "Less than 1.5l"

[Mr Revhead]

i wrote a big-worded letter quoting several sources so hopefully that will do.
they origanally wanted a statement form the manufactorer stating the info.
oh what fun it would be getting that out of japan