Hi guys Returning briefly to the hot weather vs. PFD's debate: I finally tried out a friend's inflatable PFD the other day. Even popped the cartridge, at her request. I was really impressed at the buoyancy. The thing that really sells me is that with it on and uninflated, it's comfortable, and if you get a wee bit nervous you can blow it up by mouth, thus not "wasting" a CO2 cartridge. I'm getting one, and promise never to paddle without it on, even in So. Fla. ("Never?" "Well, hardly ever."...) Slainte! e Elaine Harmon - eilidh_at_dc.seflin.org - eharmon_at_cs.miami.edu *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
I wonder what happens if you have it mouth inflated and then get tossed and forgetting, pull the CO2 inflator tab. Does it have a safety valve or do you hear a loud bang? =^..^= --Mel-- Mel Lammers mslammers_at_earthlink.net ----- Original Message ----- From: Elaine Harmon <eharmon_at_cs.miami.edu> To: <PaddleWise_at_lists.intelenet.net> Sent: Monday, August 30, 1999 3:46 PM Subject: [Paddlewise] Inflatable PFD's *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
On Mon, 30 Aug 1999, Mel Lammers wrote: > I wonder what happens if you have it mouth inflated and then get tossed and > forgetting, pull the CO2 inflator tab. > > Does it have a safety valve or do you hear a loud bang? I asked the owner, what if you pull the tab when it's partly inflated and you want to top it up in a hurry, and she didn't know. Maybe someone on the list does? e Elaine Harmon - eilidh_at_dc.seflin.org - eharmon_at_cs.miami.edu *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
At 17:14 8/30/99 -0400, Elaine Harmon <eharmon_at_cs.miami.edu> wrote: >On Mon, 30 Aug 1999, Mel Lammers wrote: > >> I wonder what happens if you have it mouth inflated and then get tossed and >> forgetting, pull the CO2 inflator tab. >> >> Does it have a safety valve or do you hear a loud bang? > > I asked the owner, what if you pull the tab when it's partly inflated and >you want to top it up in a hurry, and she didn't know. Maybe someone on >the list does? e big disclaimer: i haven't worked with inflatables in 9 years, but i was a member of the biggest org. using them ;-) or more like o-) anyway, if they were full and you pulled, pop <8-( you deflate them through the same tube you inflate, but i believe a "high pressure squeeze" would shut a valve to save the user from becoming "stupid" real fast at their own hands. a slower release, such as to deflate would be ok. [isn't that how rafts/inflatables valves work?] mark #------canoeist[at]netbox[dot]com-------------------------------------- mark zen o, o__ o_/| o_. po box 474 </ [\/ [\_| [\_\ ft. lupton, co 80621-0474 (`-/-------/----') (`----|-------\-') #~~~~~~~~~~~~~~~~~~~~~~~~~~~_at_~~~~~~~_at_~~~~~~~~~~~~~~~~~~~_at_~~~~~~~~_at_~~~~~ http://www.diac.com/~zen/paddler [index of Paddling websites I manage] Rocky Mtn Sea Kayak Club, Colorado River Flows, Poudre Paddlers The Colorado Paddlers' Resource, Rocky Mtn Canoe Club Trip Page -- Computers are useless. They can only give you answers. --Pablo Picasso *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
I once did this to a Rescue float I was testing that had an added CO2 inflator and no safety valve. I pulled the cord and pushed it to the other side of a car. it didn't explode like I had expected it might but for a week every time I taped it, it rang like a bell. Matt Broze http://www.marinerkayaks.com -----Original Message----- From: Mel Lammers <mslammers_at_earthlink.net> To: Elaine Harmon <eharmon_at_cs.miami.edu>; PaddleWise_at_lists.intelenet.net <PaddleWise_at_lists.intelenet.net> Date: Monday, August 30, 1999 2:10 PM Subject: Re: [Paddlewise] Inflatable PFD's >I wonder what happens if you have it mouth inflated and then get tossed and >forgetting, pull the CO2 inflator tab. > >Does it have a safety valve or do you hear a loud bang? >=^..^= >--Mel-- >Mel Lammers >mslammers_at_earthlink.net > >----- Original Message ----- >From: Elaine Harmon <eharmon_at_cs.miami.edu> >To: <PaddleWise_at_lists.intelenet.net> >Sent: Monday, August 30, 1999 3:46 PM >Subject: [Paddlewise] Inflatable PFD's > > > >*************************************************************************** >PaddleWise Paddling Mailing List >Submissions: paddlewise_at_lists.intelenet.net >Subscriptions: paddlewise-request_at_lists.intelenet.net >Website: http://www.paddlewise.net/ >*************************************************************************** *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
Since your lungs can only produce about 3 1/2 psi, filling the pfd by mouth will make very little difference in the final inflation pressure when you trigger the high pressure CO2 bottle. In other words "it don't ammount to a fart in a wirlwind". 73 Gary On Wed, 1 Sep 1999, Matt Broze wrote: > I once did this to a Rescue float I was testing that had an added CO2 > inflator and no safety valve. I pulled the cord and pushed it to the other > side of a car. it didn't explode like I had expected it might but for a week > every time I taped it, it rang like a bell. > Matt Broze > http://www.marinerkayaks.com > -----Original Message----- > From: Mel Lammers <mslammers_at_earthlink.net> > To: Elaine Harmon <eharmon_at_cs.miami.edu>; PaddleWise_at_lists.intelenet.net > <PaddleWise_at_lists.intelenet.net> > Date: Monday, August 30, 1999 2:10 PM > Subject: Re: [Paddlewise] Inflatable PFD's > > > >I wonder what happens if you have it mouth inflated and then get tossed and > >forgetting, pull the CO2 inflator tab. > > > >Does it have a safety valve or do you hear a loud bang? > >=^..^= > >--Mel-- > >Mel Lammers > >mslammers_at_earthlink.net > > > >----- Original Message ----- > >From: Elaine Harmon <eharmon_at_cs.miami.edu> > >To: <PaddleWise_at_lists.intelenet.net> > >Sent: Monday, August 30, 1999 3:46 PM > >Subject: [Paddlewise] Inflatable PFD's > > > > > > > >*************************************************************************** > >PaddleWise Paddling Mailing List > >Submissions: paddlewise_at_lists.intelenet.net > >Subscriptions: paddlewise-request_at_lists.intelenet.net > >Website: http://www.paddlewise.net/ > >*************************************************************************** > > *************************************************************************** > PaddleWise Paddling Mailing List > Submissions: paddlewise_at_lists.intelenet.net > Subscriptions: paddlewise-request_at_lists.intelenet.net > Website: http://www.paddlewise.net/ > *************************************************************************** > -- gpewitt_at_execpc.com N9ZSV 414 355 8147 Gary Pewitt 6120 W. Calumet Rd. Apt 204 Milwaukee, WI 53223. Boatanchor buff Sturgeon's Law: 90% of Everything is crap. *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
Gary Pewitt wrote: > > Since your lungs can only produce about 3 1/2 psi, filling the pfd > by mouth will make very little difference in the final inflation > pressure when you trigger the high pressure CO2 bottle. > In other words "it don't ammount to a fart in a wirlwind". I believe this is misleading. Though mouth inflation is done at relatively low pressure, it is possible to fill the inflatable PFD by mouth. The *very small* (in volume) CO2 cylinder has to have an *initially* very high pressure so that it can contain the necessary number of air molecules to fully inflate the PFD. When exhausted, the CO2 cylinder does not exert its full initial pressure. Consequently, if you inflate the PFD to fullness with your mouth, *and then* the CO2 cylinder is triggered, it will endavor to *add* its molecules to the ones your mouth put there -- possibly causing the pressure to rise to (roughly) twice what the CO2 cylinder could achieve alone. This might exceed the ability of the PFD to hold air -- in other words, it might pop. My guess is that mfrs anticipate someone doing this and build in a safety factor of two or three so it probably would not leak. Anybody tried this? -- Dave Kruger Astoria, OR chemist *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
I don't know for sure, but my guess would be inflatable PFDs have the same sort of "over-pressure relief valve" as scuba diving Bouyancy Compensators do. It's a plastic disc held down by a spring of a rated strength. When the pressure inside the vest exceeds the determined amount (which should be well below what the fabric and seams can withstand), the pressure pushes the disc open, bleeding off air until the pressure lowers to the point the spring can push the disc shut again. Simple, and fairly foolproof. Philip Torrens N49°16' W123°06' >From: Elaine Harmon <eharmon_at_cs.miami.edu> >To: Mel Lammers <mslammers_at_earthlink.net> >CC: PaddleWise_at_lists.intelenet.net >Subject: Re: [Paddlewise] Inflatable PFD's >Date: Mon, 30 Aug 1999 17:14:57 -0400 (EDT) > >On Mon, 30 Aug 1999, Mel Lammers wrote: > > > I wonder what happens if you have it mouth inflated and then get tossed >and > > forgetting, pull the CO2 inflator tab. > > > > Does it have a safety valve or do you hear a loud bang? > > I asked the owner, what if you pull the tab when it's partly inflated and >you want to top it up in a hurry, and she didn't know. Maybe someone on >the list does? e > > >Elaine Harmon - eilidh_at_dc.seflin.org - eharmon_at_cs.miami.edu *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
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