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30 April 2012, 22:13
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#1
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Member
Country: UK - England
Town: bournemouth
Boat name: n/a
Make: bombard
Length: 3m +
Engine: outboard
Join Date: May 2007
Posts: 54
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Inflation Question
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.
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30 April 2012, 22:25
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#2
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Member
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
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It doesn't matter, the baffles between chambers can take full inflation pressure.
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30 April 2012, 23:16
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#3
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Member
Country: UK - Channel Islands
Town: jersey
Boat name: Martini II
Make: Arctic 28/FC470
Length: 8m +
Engine: twin 225Opti/50hp 2t
MMSI: 235067688
Join Date: Jun 2005
Posts: 3,030
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Quote:
Originally Posted by captnjack
It doesn't matter, the baffles between chambers can take full inflation pressure.
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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.
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30 April 2012, 23:39
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#4
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Member
Country: UK - England
Town: kent
Boat name: SIBotage
Make: Prowave
Length: 3m +
Engine: 15hp Johnson 2 smoke
Join Date: Sep 2010
Posts: 435
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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.
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That what I've heard and do every time.
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01 May 2012, 00:31
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#5
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Member
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
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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.
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Build quality must not be that high on those UK boats
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01 May 2012, 06:39
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#6
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Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
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Quote:
Originally Posted by captnjack
Build quality must not be that high on those UK boats
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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
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01 May 2012, 07:45
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#7
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Member
Country: UK - England
Town: bournemouth
Boat name: n/a
Make: bombard
Length: 3m +
Engine: outboard
Join Date: May 2007
Posts: 54
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Think I will take the safe route, partially inflate it is.
thanks guys.
Dek.
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01 May 2012, 09:00
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#8
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Member
Country: UK - Channel Islands
Town: A large rock
Boat name: La Frette
Make: Osprey Vipermax
Length: 6m +
Engine: 200 Suzzy
Join Date: May 2004
Posts: 2,893
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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.
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01 May 2012, 09:31
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#9
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Member
Country: Denmark
Town: copenhagen
Make: Avon SR 4.7
Length: 4m +
Engine: E-tec 90hp
Join Date: Aug 2009
Posts: 78
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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.
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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.
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01 May 2012, 12:38
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#10
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Member
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
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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 .
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01 May 2012, 12:49
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#11
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Member
Country: UK - England
Town: Towcester
Boat name: N/A
Make: Honwave T35
Length: 3m +
Engine: Honda 20hp
Join Date: Dec 2011
Posts: 5
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3 Way Adaptor
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
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01 May 2012, 12:57
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#12
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Member
Country: UK - England
Town: kent
Boat name: SIBotage
Make: Prowave
Length: 3m +
Engine: 15hp Johnson 2 smoke
Join Date: Sep 2010
Posts: 435
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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
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Good idea, let me know if you manufacture something.
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01 May 2012, 14:11
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#13
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Member
Country: UK - England
Town: Nuneaton
Boat name: ribbit
Make: ring
Length: 6m +
Engine: opti 150
Join Date: Oct 2011
Posts: 557
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Quote:
Originally Posted by captnjack
Build quality must not be that high on those UK boats
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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
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01 May 2012, 15:21
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#14
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Member
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
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Quote:
Originally Posted by captnjack
It doesn't matter, the baffles between chambers can take full inflation pressure.
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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.....
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01 May 2012, 16:08
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#15
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Member
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
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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
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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.
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01 May 2012, 16:10
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#16
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Member
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
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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.....
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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.
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01 May 2012, 20:57
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#17
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Member
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
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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.
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01 May 2012, 21:13
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#18
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Member
Country: UK - England
Town: Bucks
Boat name: Blue & Ding Dong
Make: Ribeye,SR4 & Bombard
Length: 6m +
Engine: 115,50 & 15Hp Yams
Join Date: Feb 2004
Posts: 3,252
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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
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01 May 2012, 21:15
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#19
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Member
Country: UK - England
Town: Bristol
Make: Ribcraft
Length: 5m +
Engine: Yamaha
Join Date: May 2006
Posts: 4,299
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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
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03 May 2012, 16:02
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#20
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Member
Country: Other
Town: Madrid-Almeria
Boat name: SEPIA
Make: honwave
Length: 3m +
Engine: Honda BF20
Join Date: Feb 2010
Posts: 197
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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.
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