Inflation Question

dek · 30 April 2012, 21:13

Hi
Is it safe to inflate each chamber to its full pressure one at a time, or should I partially inflate each chamber to near full pressure then start again at no. 1 and so on .
Hope that makes sense.
cheers.
Dek.

captnjack · 30 April 2012, 21:25

It doesn't matter, the baffles between chambers can take full inflation pressure.

martini · 30 April 2012, 22:16

Quote:

Originally Posted by captnjack

It doesn't matter, the baffles between chambers can take full inflation pressure.

Many on here would disagree with that. The consensus seems to be to inflate all chambers till they have shape then go round again pumping to normal working pressure.

lockieboi · 30 April 2012, 22:39

Quote:

Originally Posted by martini

Many on here would disagree with that. The consensus seems to be to inflate all chambers till they have shape then go round again pumping to normal working pressure.

That what I've heard and do every time.

captnjack · 30 April 2012, 23:31

Quote:

Originally Posted by martini

Many on here would disagree with that. The consensus seems to be to inflate all chambers till they have shape then go round again pumping to normal working pressure.

Build quality must not be that high on those UK boats

jyasaki · 01 May 2012, 05:39

Quote:

Originally Posted by captnjack

Build quality must not be that high on those UK boats

Has more to do with purpose. Baffles are a stopgap, to prevent compete deflation in the event of a catastrophic failure of one section. From experience, I know that they are no stronger than any particular section of tube. Better to be safe than sorry (or in the water, wondering what the hell happened.)

jky

dek · 01 May 2012, 06:45

Think I will take the safe route, partially inflate it is.
thanks guys.
Dek.

Erin · 01 May 2012, 08:00

What's the point in having baffles then if they can't take the pressure of a fully inflated chamber? Surely their primary purpose is to keep you buoyant if you puncture a chamber.

njensen · 01 May 2012, 08:31

Quote:

Originally Posted by Erin

What's the point in having baffles then if they can't take the pressure of a fully inflated chamber? Surely their primary purpose is to keep you buoyant if you puncture a chamber.

i agree... what's the point of having a safety mechanism which is weaker than rest of the tube. However i do a intermediate pump before final pressure.

m chappelow · 01 May 2012, 11:38

One slight advantage if inflating manually (foot pump ) by opening all the valves and then inflating one section to full as it inflates it does then help draw a little air into the next open chamber .

dominic_baker · 01 May 2012, 11:49

I have a Honwave T35 alu deck and the engineer in me has always thought that an adaptor which splits your pump output into 3 connectors would be a good idea (with long enough pipework to reach all).

You could then connect all 3 main chambers and inflate all together - they will be perfectly balanced during inflation and at completion.

Regards,

Dominic

lockieboi · 01 May 2012, 11:57

Quote:

Originally Posted by dominic_baker

I have a Honwave T35 alu deck and the engineer in me has always thought that an adaptor which splits your pump output into 3 connectors would be a good idea (with long enough pipework to reach all).

You could then connect all 3 main chambers and inflate all together - they will be perfectly balanced during inflation and at completion.

Regards,

Dominic

Good idea, let me know if you manufacture something.

bingosucks · 01 May 2012, 13:11

Quote:

Originally Posted by captnjack

Build quality must not be that high on those UK boats

haha , made me smile i can`t see your hse being anywhere near as anal as a british one

though i always inflate my shanghai special 3/4 then top each chamber up

PeterM · 01 May 2012, 14:21

Quote:

Originally Posted by captnjack

It doesn't matter, the baffles between chambers can take full inflation pressure.

Or you can do what the Bombard manual advise -which is take them all up to 3/4 ish pressure and then go round and top off.....

captnjack · 01 May 2012, 15:08

Quote:

Originally Posted by dominic_baker

I have a Honwave T35 alu deck and the engineer in me has always thought that an adaptor which splits your pump output into 3 connectors would be a good idea (with long enough pipework to reach all).

You could then connect all 3 main chambers and inflate all together - they will be perfectly balanced during inflation and at completion.

Regards,

Dominic

This does not work. I tried it and you will preferentially inflate one chamber possibly overpressurizing it. The valves don't all open at exactly the same pressure, there's flow losses in the shorter tubes and a bunch of other factors which conspire against it being simple.

captnjack · 01 May 2012, 15:10

Quote:

Originally Posted by PeterM

Or you can do what the Bombard manual advise -which is take them all up to 3/4 ish pressure and then go round and top off.....

Well I never deflate mine anyway, so they are all basically round before I start. Where the baffle is I don't worry about, for all I know it could be 99% towards one chamber vs another.

m chappelow · 01 May 2012, 19:57

Don't forget some boats need a sequence starting at the bow and working back otherwise on some makes the baffles can be reversed and cause stress problems some times causing a waist on the sponson/tube.

Nick Hearne · 01 May 2012, 20:13

I onece pumped my Aerotec with my bravo pump to the same pressure as the floor

didn't do any damage & I do not set the boat up after the pub any more

matt h · 01 May 2012, 20:15

As Peterm says.....In most Tube manuals it will clearly state they should not be fully inflated individually. Dek i would gradually do it...as all decent manufacturers would indicate that. its also in your handbook

azzurro · 03 May 2012, 15:02

When a chamber deflates, the near inflated chamber baffle protudes into the deflated chamber. Thus, the pressure in the inflated chamber GOES DOWN because the volume expands.

In the opposite: if you inflate a chamber to the correct pressure, but not the near chamber, the inflated chamber baflle protudes.
So when you inflate the near chamber, the baffle will go back - INCREASING THE PRESSURE OF THE CHAMBER.

That is exactly the mechanism that explains how to get a third family jewel with a hernia.
How disgusting.