And here http://www.happymonkeysnowboards.com/HM ... struction/ under Pneumatics

Same as the first post above but may have a tad more info

Hi hafte, On the epoxy hard data, I doubt there's a lot out there. Ski & Snowboard making is still more of an art than a science, and is heavily based on trial and error - even with the big boys like Burton and K2. Generally though, ski/board epoxies are developed with specific properties in min...

I ended up going past a place called Crusader Hoses in Bayswater - was picking up some aluminium for the cat track from aluminium express (thanks falls) and it's in the next street. 150mm dia hose (6" or so) which is around 235mm layflat (9.5") for $15/m, for those interested.

8" when laying flat, so around 5" diameter when inflated.

Thanks Yuki

Hi,

looking for some 8" layflat fire hose, in Australia or someone willing to post. I need about 5m (16-17'). If anyone could help me out would be gretly appreciated - hard to find this size here!

Plastic sidewalls most definitely provide dampening, look at Ride's vid on slimewall tech. The most effective place for dampening materials is in torsion, not bending. Have a look at viscoelastic dampers on race skis. My final year project / thesis for my mech eng degree is on snowboard torsional vi...

FYI you can get SnoCAD-x from grafsnowboards.com for free, it's basic but it does the job for most things. I think it does skis too, has a setting for it at least, though I've only used it for boards.

Its hard to say without knowing the ultimate tensile strength of the material. Anyone have any idea what that is?

Hey guys, I'm doing my final yr mech eng project on snowboards as well, I wonder if you'd mind sending me your reports? It would be a great help with my research! I'll return the favour and send my research in 8 months time when it is complete, it is based on torsional vibrations and stiffness in sn...

Annealing softens the material, not really desirable for ski/board edges, they plastically deform too easily and could have an adverse effect on hard usage (i.e. under board/ski flex, they bend and plastically deform instead of springing back). To harden them again you need to reheat them to the aus...

Thanks guys, I figured that would be the case but just wanted to make sure it wasn't going to amplify anything elsewhere.

I've done a basic FEA using solidworks, but can't post the pic just yet ... it shows 0.422mm deflection max

I've done a very basic calculation on I beam deflection, for a 305 x 165 I beam at 40kg/m, with a 2m long cavity at 340kPa (50psi approx), simply supported using a uniform load. The deflection projected not including mass of beam is approximately 0.7mm. What does this translate to in real world term...