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Old 10 June 2019, 02:39   #1
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Usefull Adapter

Just bought one of these could be useful for topping up.

Would be a slow process to pump up whole sib but if your pump failed any person with a car might have a pump or you could buy a cheap one locally and not spoil your outing

https://www.ebay.co.uk/itm/Air-Pump-....c100227.m3827

Dennis
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Old 10 June 2019, 11:55   #2
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Not to burst your bubble but a car pump won't work on our inflatable boats.
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Old 10 June 2019, 13:07   #3
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A tube pump tends to be high volume and low pressure whereas a car pump is the opposite. It would work but it would be a slow process.
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Old 10 June 2019, 14:33   #4
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That's interesting. Have you tried it yet on the boat valve? If it's a good fit & works I might get one for inflating & washing down at home. I think my compressor would inflate it good enough for a quick wash 'n clean way quicker than the ITIWIT.
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Old 10 June 2019, 17:53   #5
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Originally Posted by brveagle View Post
Not to burst your bubble but a car pump won't work on our inflatable boats.
I guess you didn't read my initial post
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Old 11 June 2019, 11:02   #6
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I guess you didn't read my initial post
A "cheap" car tyre compressor would really really struggle to "top off" a sib to 3.4 psi with that adapter.

That's all i am saying.
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Old 11 June 2019, 11:31   #7
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A "cheap" car tyre compressor would really really struggle to "top off" a sib to 3.4 psi with that adapter.

That's all i am saying.

You mean that car compressor that pumps up car tyres to over 32 psi easily

Why do you think it will struggle
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Old 11 June 2019, 12:02   #8
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It would certainly burst your bubble if you fell asleep while waiting for it to fill ..however the compressor would not struggle in the slightest.

I remember many years ago my father forgot the pump for his Avon Restart tender. He had to use his lungs to inflate it that day.. now that is what you could call struggling.. he would have taken your hand off for that adaptor back then.
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Old 11 June 2019, 12:16   #9
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You mean that car compressor that pumps up car tyres to over 32 psi easily

Why do you think it will struggle
I'm not trying to argue, I'm simply trying to reiterate what was already posted above. A tire compressor works on a low volume, high psi basis.

Our inflatable boats require a high volume, low psi pump.

For example a bravo 12 pump flows approx 160L/min. A quick amazon search shows that a simple 12v tire compressor flows less than 30L/min. Aka 1/5th the amount of flow.

Those little compressors are air cooled and designed to run for short periods of time otherwise heat becomes a factor resulting in a loss of reliability and increased amount of wear for the tiny little piston. Not to mention most pull 15-20 amps of current which would cause the wire leads to get quite warm.

I stand behind my statement that a tire compressor would struggle. But you are in a unique position to test out your theory and let us/me know how it works.

Cheers
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Old 11 June 2019, 12:41   #10
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Just buy a spare pump, and keep it in the boot or boat, simples..
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Old 11 June 2019, 12:54   #11
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A tube pump tends to be high volume and low pressure whereas a car pump is the opposite. It would work but it would be a slow process.
Agreed and it won't last long before it overheats run time is low on them but the adapter would be good for a workshop compressor with a gauge to prevent over inflation
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Old 11 June 2019, 13:02   #12
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I'm not trying to argue, I'm simply trying to reiterate what was already posted above. A tire compressor works on a low volume, high psi basis.

Our inflatable boats require a high volume, low psi pump.

For example a bravo 12 pump flows approx 160L/min. A quick amazon search shows that a simple 12v tire compressor flows less than 30L/min. Aka 1/5th the amount of flow.

Those little compressors are air cooled and designed to run for short periods of time otherwise heat becomes a factor resulting in a loss of reliability and increased amount of wear for the tiny little piston. Not to mention most pull 15-20 amps of current which would cause the wire leads to get quite warm.

I stand behind my statement that a tire compressor would struggle. But you are in a unique position to test out your theory and let us/me know how it works.

Cheers
Yup a short period of time is all that will be needed to top up the pressure in the boat. So will work fine

I say again did you read my initial boat.

But for circa 4 quid do we need to worry
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Old 11 June 2019, 13:13   #13
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You don't wanna come in on the M25 you wanna go on the M11
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Old 11 June 2019, 13:15   #14
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Old 11 June 2019, 14:22   #15
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Usefull Adapter

Whilst fashionable on here to diss BP, this potentially ainít a bad find. Key word he mentioned is top up, which all the nay sayers are choosing to ignore.

For a high pressure air floor sib, think Aerotec/T38, then topping up after 15mins on the water is a given if you want top performance. Yeah great, use your battery air pump ashore to inflate to max pressure. Trouble is you then need to carry said mega expensive pump aboard to top up pressure drop due to water temp affects, as trying to use the foot pump to push 0.8bar whilst afloat is nigh impossible. Adding a relatively small volume of air at high pressure with say an mtb hand pump may enable one to leave the expensive/fragile battery pumps safely in the car. Iíd still carry the cheap/moisture tolerant stock foot pump aboard for emergencies and toob top ups.

Might give one of those gizmos a try. Itís only four quid anyways!

Good find BP.
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Old 11 June 2019, 14:34   #16
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Top up is still large volume if topping up from 2.5 psi to 3psi it's 1/6th the volume a lot of gas
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Old 11 June 2019, 14:52   #17
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Point taken Jeff.

However, talking say 10% max drop in a relatively low volume drop stitch hp air floor, not a tube. A large volume mtb hand cycle pump can shift a good amount of air up to around 40psi with ease.

Worth a punt in my book if it enables me to leave the mega expensive/fragile battery pump ashore... not bouncing around in a wet boat for the day.
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Old 11 June 2019, 15:00   #18
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Sadly I did the same calculation as above and arrived at the same conclusion as our American friend.

A small'ish SIB / RIB tube let's say 400mm in diameter and 4.8m long (per side) would have a volume of about 1200 litres. At 30 litres per minute, the compressor is working for 40 minutes which may be beyond its duty cycle.
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Old 11 June 2019, 15:03   #19
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Jeez. Change the record guys

Talking topping up here,not inflating from scratch. Also talking low volume high pressure air floors, not voluminous toobs.
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Old 11 June 2019, 15:05   #20
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Just to add I think it is probably useful to have in your armoury because even blowing it up with a bike pump would be better than not blowing it up at all.
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