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This is a multi-part message in MIME format. ------=_NextPart_000_001A_01C06201.0605B2E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I'm trying to work out the buoyancy characteristics of aluminium = (Luxfer) 12L cylinders (the sort which are regularly used in the Red = Sea). I'm off to Sharm over Xmas and will be twinning up a pair of 12L = cylinders to be used as independents. Question is, what will the buoyancy characteristics be like? I have worked out that a pair of these cylinders will be POSITIVELY = buoyant by about 4.2kg when EMPTY and NEGATIVELY buoyant by about 2.2kg = when FULL. If this is correct it means a great deal of lead will need = to be carried on the weight belt to compensate for the positive buoyancy = when empty (no backplate). Does anybody know the exact weight/volume and dimensions of these = cylinders? I think they are generally referred to as an "Aluminium 80". = If they are BS5045:Part 3 cylinders they should have a diameter of = 204mm and a weight of 16.48kg. Has anybody got any information or had experience of diving doubles in = the Red Sea? Bob UK diver ------=_NextPart_000_001A_01C06201.0605B2E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content=3D"text/html; charset=3Diso-8859-1" = http-equiv=3DContent-Type> <META content=3D"MSHTML 5.00.2919.6307" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2> <DIV>I'm trying to work out the buoyancy characteristics of aluminium = (Luxfer)=20 12L cylinders (the sort which are regularly used in the Red Sea). = I'm off=20 to Sharm over Xmas and will be twinning up a pair of 12L cylinders to be = used as=20 independents.</DIV> <DIV> </DIV> <DIV>Question is, what will the buoyancy characteristics be like?</DIV> <DIV> </DIV> <DIV>I have worked out that a pair of these cylinders will be POSITIVELY = buoyant=20 by about 4.2kg when EMPTY and NEGATIVELY buoyant by about 2.2kg when = FULL. =20 If this is correct it means a great deal of lead will need to be carried = on the=20 weight belt to compensate for the positive buoyancy when empty (no=20 backplate).</DIV> <DIV> </DIV> <DIV>Does anybody know the exact weight/volume and dimensions of these=20 cylinders? I think they are generally referred to as an "Aluminium = 80". If they are BS5045:Part 3 cylinders they should have a = diameter of=20 204mm and a weight of 16.48kg.</DIV> <DIV> </DIV> <DIV>Has anybody got any information or had experience of diving doubles = in the=20 Red Sea?</DIV> <DIV> </DIV> <DIV>Bob</DIV> <DIV>UK diver</DIV></FONT></DIV></BODY></HTML> ------=_NextPart_000_001A_01C06201.0605B2E0-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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