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09 October 2019, 22:19
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#1
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Member
Country: UK - England
Town: Lancaster
Length: under 3m
Join Date: Oct 2019
Posts: 324
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Inflating
My sib came with a foot pump only. On the plate maximum pressure stated at 3.4psi.
Do I just stop as it starts to sound pressurised
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09 October 2019, 23:43
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#2
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Member
Country: UK - England
Town: Sussex
Boat name: Bombard
Make: Aerotec 380
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 3,494
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No, use a gauge.
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10 October 2019, 06:50
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#3
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Member
Country: UK - England
Town: Waterlooville
Boat name: Tickler
Make: Halmatic P22
Length: 6m +
Engine: Inboard Diesel 240HP
MMSI: 235115642
Join Date: Sep 2015
Posts: 1,777
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You can get gauges that are either built in to the pump or fit in line.
For example
https://www.force4.co.uk/bravo-7m-fo...auge-5ltr.html
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10 October 2019, 08:54
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#4
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Member
Country: UK - England
Town: Waterlooville
Boat name: Tickler
Make: Halmatic P22
Length: 6m +
Engine: Inboard Diesel 240HP
MMSI: 235115642
Join Date: Sep 2015
Posts: 1,777
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Just to add to this.
If a boat is under inflated there are at least couple of potential issues:
The lack of rigidity will mean that the seakeeping and performance will be compromised.
If an outboard is being used, the tubes hold the transom in place and if they are under inflated, the transom may move about causing damage to the connections to the tubes and bottom.
I spent a few years sailing and often used a small SIB with an outboard to get from the boat to dry land aka the pub and never once did I check the tube pressures. The tubes would be blown up until they were "pressurised". Overloading with drunk crew was also taken in the SIB's stride. Whilst I doubt whether this approach could be condoned nowadays I'd say if you were just pottering around, then inflating it until it was pressurised would be fine. If you are attempting to explore the performance envelope of your SIB, getting the pressures correct is a good starting point.
Over-inflating also causes issues, primarily that you may overstress the seams that hold the SIB together.
Things are further complicated by the cooling / warming effects of the water and sunshine although living in Lancaster that possibly should be cooling / cooling.
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10 October 2019, 09:50
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#5
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Member
Country: UK - England
Town: Lancaster
Length: under 3m
Join Date: Oct 2019
Posts: 324
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Thanks guys
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10 October 2019, 10:55
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#6
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Member
Country: UK - England
Town: Lancaster
Length: under 3m
Join Date: Oct 2019
Posts: 324
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I've just looked through the force 4 website. The separate gauge looks like it has a push fit at one end and the other is a bayonet type fitting. My foot pump just pushes into the valve on my sib (Boston valve?). What adapter do I need?
Thanks
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10 October 2019, 11:26
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#7
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Member
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,532
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10 October 2019, 11:54
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#8
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Member
Country: UK - England
Town: Waterlooville
Boat name: Tickler
Make: Halmatic P22
Length: 6m +
Engine: Inboard Diesel 240HP
MMSI: 235115642
Join Date: Sep 2015
Posts: 1,777
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Quote:
Originally Posted by jeffstevens763@g
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Other pumps are available
TBH I hadn't considered the ins and outs of fitting a gauge to an existing pump.
I suspect your best bet would be to buy a pump, either electric or manual, with a gauge and save your existing pump as a spare / to go on the boat.
Discussion on electric pumps quickly descends into a commons like slanging match. I can't comment on the pro's and con's of each brand as I only own one brand but I would agree with jeffstevens in that they are worth every penny.
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10 October 2019, 12:31
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#9
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Member
Country: UK - England
Town: Sussex
Boat name: Bombard
Make: Aerotec 380
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 3,494
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An old topic now but the ones I made here are still working fine eight years on:
http://www.rib.net/forum/f50/adaptin...sib-42375.html
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10 October 2019, 12:45
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#10
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,172
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Quote:
Originally Posted by GuyC
Other pumps are available
.......Discussion on electric pumps quickly descends into a commons like slanging match......
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Surely not[emoji6]
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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10 October 2019, 12:56
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#11
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Member
Country: UK - Scotland
Town: Denny
Boat name: Highland Bluewater
Length: 6m +
Join Date: Mar 2013
Posts: 1,647
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Quote:
Originally Posted by Pikey Dave
Surely not[emoji6]
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Yep.....Folk get all pumped up about this.
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10 October 2019, 12:58
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#12
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Member
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,532
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as GuyC says there are others. only my experience sevylor pump £59 burnt out pumping my 6m rib up first time, bought a bravo pump lasted a year £115 secondary motor stopped working, now have the itwit lasted a year still going. so i can have nearly three itwits for the price of the bravo.OMO
i only get deflated when they dont work
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10 October 2019, 13:59
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#13
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Member
Country: UK - England
Town: Lancaster
Length: under 3m
Join Date: Oct 2019
Posts: 324
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So on my plate it states 3.4psi. Is this just for the tubes.?
I'm guessing the keel and floor can just be pumped till 'firm'?
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10 October 2019, 14:31
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#14
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Member
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,532
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Quote:
Originally Posted by Tommy c
So on my plate it states 3.4psi. Is this just for the tubes.?
I'm guessing the keel and floor can just be pumped till 'firm'?
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your floor is a high pressure floor Tom i guess around 11psi but since your max hp is 4hp if not sure i would blow up nice and stiff you're not going to be getting on the plane so not critical if you have a hand book it should tell you. if the floor bends a bit just put a tad more air in
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10 October 2019, 15:17
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#15
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Member
Country: UK - England
Town: Lancaster
Length: under 3m
Join Date: Oct 2019
Posts: 324
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Quote:
Originally Posted by jeffstevens763@g
your floor is a high pressure floor Tom i guess around 11psi but since your max hp is 4hp if not sure i would blow up nice and stiff you're not going to be getting on the plane so not critical if you have a hand book it should tell you. if the floor bends a bit just put a tad more air in
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That would explain why the floor has got a metal valve instead of the plastic ones on the tubes and keel
11psi seems a lot though
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10 October 2019, 15:41
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#16
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Member
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,532
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Quote:
Originally Posted by Tommy c
That would explain why the floor has got a metal valve instead of the plastic ones on the tubes and keel
11psi seems a lot though
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found this, also the pumps are rated to 14.2 psi which kind of ties in 3.4 x 4= 13.6psi
https://www.thehulltruth.com/boating...nflatable.html
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10 October 2019, 16:42
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#17
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Member
Country: UK - England
Town: Waterlooville
Boat name: Tickler
Make: Halmatic P22
Length: 6m +
Engine: Inboard Diesel 240HP
MMSI: 235115642
Join Date: Sep 2015
Posts: 1,777
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Quote:
Originally Posted by Tommy c
That would explain why the floor has got a metal valve instead of the plastic ones on the tubes and keel
11psi seems a lot though
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My Zodiac has an air floor and it is basically a drop stitch slab, a bit like an inflatable SUP. It should be inflated to 11psi and it also has a metal valve so yours requiring 11psi isn't out of the ordinary.
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10 October 2019, 19:57
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#18
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Member
Country: UK - England
Town: Lancaster
Length: under 3m
Join Date: Oct 2019
Posts: 324
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Just came across this whilst searching
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10 October 2019, 20:10
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#19
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Member
Country: UK - England
Town: Lancaster
Length: under 3m
Join Date: Oct 2019
Posts: 324
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It also says the boats supplied foot pump can't over inflate the inflatable. What do you think?
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10 October 2019, 23:22
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#20
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Member
Country: UK - England
Town: Thame
Boat name: Free-Flow
Make: Shearwater 6.8
Length: 6m +
Engine: Suzuki 175
Join Date: Mar 2012
Posts: 318
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I have a question. How can a gague on a pump work if the valve shuts off the air when you stop pumping?
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