nick0 said...
i keep my plud done up .. cant be bother playing with it ... but how much could the board posibly expand .. some one nees to measure how much air is sucked in under extreme temps .. say 50 degrees .. i reckon it would be so lil .. and some one mentioned a long time ago in a thread .. thier like 0.6% water in 10l of air .. so it cnt posibly suck enough water to make anny diference
Who cares
how much the board expands...it doesn't take much movement when it is
repeated expansion and contraction.
Get some styro and see how easy it is to separate the balls. TWith the sandwich moving in and out say 0.5mm over and over again it will eventually fracture the styro. When we talk about delamination, ppl visualise the sandwich coming "unglued". It doesn't: it is usually a break in the styro parallel to the divinycell ..... if you take it apart it looks like a layer of divinycell with one layer of styro balls glued to it.
I can't be bothered doing the math but going off the hiss when I open the vent plug just on a normal 30deg day I reckon it could get to 30 or 40psi (?) inside the board in a car if the plug is done up?