Need some advice/feedback (RIB - R)

[Mr-d]

Hi, we just bought a Corsair Domar Inflatable boat (with inflatable keel)

It looks like a rib, it performs similar to a rib, so i just call it a rib, even though there is not a single piece of fiber glass on it.

Anyway, i was wondering, since the tubes are similar to a normal RIB, what pressure should be put onto it? I have no idea how far i can go, as we have a compressor that can go up to 8BAR, and i chicken out long before 3 bar.

Also, has anyone successfully Coated an inflatable with Fiber Glass?

Ill go and take a pic of it now, will post later.

Thanks,

Daniel.

[Manos]

Is not presure you should be thinking but volume.
Presure should be about 2bar max I think.

[Mr-d]

Sideview
Back view
No view of the front right now, camera ran out of battery, and the flash decided that it was to dark to take a pic, so lit up the front end of the trailer.

Pics are about 500Kbyte each, 56K beware.

[Mr-d]

Originally Posted by Manos

Is not presure you should be thinking but volume.
Presure should be about 2bar max I think.

Well, i have no idea how much volume goes into the tubes, however there is a stage where it is *full* and you can continue filling it up after that.

How would you measure the volume entered?

[Tim M]

For a Quicksilver inflatable with inflatable keel its 250mbar (3.5psi)

(Is 250mbar 2.5 bar?? )

Manos, what do you mean "it's volume not pressure"; pressure will increase as volume does...

Pressure is the standard measurement of tube hardness round' here!

[Jackwabbit]

Avon recommend 3 to 3.5 PSI that’s 0.2Bar to 0.23Bar, we have an Avon CRRC520 which has a flexible floor. This would wallow all over the place with 6 diver on board, so I contacted Avon to see what the pressure should be & they gave me the figures above. The only time we pumped it to 3PSI the boat just touched a breakwater; there was a huge BANG with the result of a 3ft split down one side. The sudden loss of pressure in one chamber resulted in the baffle cone in the next chamber splitting and loosing air from the whole of one side of the boat. Now we only pump it until its firm not hard, so please be warned DON’T pump it too hard.

[kitten]

Originally Posted by Manos

Is not presure you should be thinking but volume.
Presure should be about 2bar max I think.

As 1 bar (being atmospheric presure ) is about 15 psi, you must have just voided any warrenty you had on your tubes by blowing them up to 30psi.

If your boat is fitted with good quality valves then apparently if the top is not sealed they will realease presure over about 11psi anyway.

[Tim M]

A local Avon dealer once told me that you should pump them up so you can still stick your finger in an inch. I tried this, but they were whey too soft. 1.2PSI works well on the RIB.

Tim

[Rupert Bear]

Depends on what you are using them for, recommendations are usually around the 2-3psi mark. 30psi is just a tad much!
If you have folk sitting on the tubes then 3psi is a bit hard as they end up bouncing up and down on the tubes with every bump.

[Jari Hjerppe]

should be correct pressure for your boat. In RIB pressure can be lower, around 0,12-0,2 bar, but SIB needs harder tube to keep the boat in shape.

Do Not use compressor to fill your boat unless you have accurate pressure gauge attached to the system.

The tube should be hard enough when you can't bend the cone in the end of the tube.

Jari