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Old 07 June 2013, 13:47   #11
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Yer, he doesn't do SIBs
That is remise of him - if it floats I'll "do" it - I will raise that general issue with Division.
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Old 07 June 2013, 13:57   #12
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...- if it floats I'll "do" it .....
I would take if it floats further - if it suppose to float !

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Old 07 June 2013, 14:54   #13
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I would take if it floats further - if it suppose to float !
S.
Totally agree SPR but the "wags" will be along to disparage this all by talking about other things that float
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Old 07 June 2013, 15:17   #14
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That is remise of him - if it floats I'll "do" it - I will raise that general issue with Division.
No names now - he was only takin' a hand at me
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Old 07 June 2013, 16:42   #15
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so if the nominal wt of cyl and contents is 139 gr you need to know wt of empty cycl to find wt of gas in cycl ? am i correct ?
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Old 07 June 2013, 17:39   #16
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so if the nominal wt of cyl and contents is 139 gr you need to know wt of empty cycl to find wt of gas in cycl ? am i correct ?
You don't need to know the weight of gas in the cylinder. You need to know it should weigh 139 g when full, and if its more than few grams off that on a reasonably accurate set of scales then it needs replaced.
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Old 08 June 2013, 04:40   #17
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I've now had a response from the retailer apologising and promising to send me two new kits next week. He admitted that it looks like someone has cobbled together a kit from some separate parts.

It seems that the capsule is more critical in terms of date but 2 years expiry seems short so i've asked for at least 3-4 years, which i think is reasonable since my 2002 jackets originally had a 2005 expiry on the capsules...

I'll expect the new cylinders to be no more than a couple of years old but in line with the advice here it seems on these weight and condition is more relevant than age.

I haven't weighed any of mine but do I assume the 33g is the total weight I should expect (including the weight of the metal cylinder itself? (sorry if that's a stupid question!)
I'd have to check but I *think* my new Hammar units came with a 5 year service life. In any case I got them from Marine Warehouse Lifejackets by mail order from Marine Warehouse Ltd - Marine Warehouse Ltd

With the hassle of shipping pressurised gas overseas (yes even a 33g CO2 cylinder which will help put the fire out if it pops) I was being quite particular about max life!

As somebody has posted, there will be a 'full weight' on the cylinder which is what you want. Checking mine, I use a set of lightweight electronic scales that are meant to be accurate to 1g, and the weights on mine were all very close about +/- 1 or 2 IIRC.

FWIW a couple of years ago I was working with somebody who replaced a load of out of date Hammar units and we test dunked a few in a sink. They all worked within seconds as they should, despite being out of date.
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Old 08 June 2013, 04:56   #18
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Yep, around a five year service life should be expected, these are the rearming kits for mine, current stock expires Dec 2018

Hammar M1A1 operating head - Marine Warehouse Ltd
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Old 10 June 2013, 13:31   #19
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Real life test !

I decided to test my jacket Sunday ....knowing it was armed with a cylinder dated 09/06 and tablet dated Mar29 07 on the side. I knew I had a spare jacket with me for exactly this purpose and in case Matth needed it (again)

Anyhow ..it worked ! I'm not saying it always would and I know the cylinder looked as new.

All of us (well AJ & MattH) commented it took a while to trigger (I'd floated up and took 2-3 secs before it went off) but I don't think is due to age - just the way Halkey Roberts works.

What was most interesting to me was the cold water. Even knowing it would be bloody cold - it took real effort to control my breathing and not jump out.

We all had a go at jumping in except the biggest girly, pansy, skirt wearing, lightweight of a ribnet member (have a guess who - PM me with title 'MattH is a huge huge girl' if you want) who even after lowering himself in couldn't deal with it and jumped straight out again...

Cold water shock...hard work keeping it all together and this was flat calm water and expected....
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