by kyri0923 » Fri Feb 01, 2019 3:25 pm
by phydeux » Sat Feb 02, 2019 3:51 pm
by freakyclimber » Sat Feb 02, 2019 8:25 pm
by LincolnB » Sat Feb 02, 2019 10:42 pm
by phydeux » Sun Feb 03, 2019 2:56 pm
LincolnB wrote:Why not get serious about oxygen? I do a lot of weekend hikes in the Sierras - when you go from sea level to 14,000' in less than 24 hours, your body forces you to climb much slower than when acclimated. Very frustrating. Once I borrowed a compressed O2 tank from a hospital friend - I felt the effect, but the 10 lb tank wasn't worth the weight. However - there are now systems that use cryogenic O2 and are much lighter. For example, from Helios: "The H300 portable unit weighs a mere 3.6 pounds filled and has duration of use of 8-10 hours at a setting of 2" - available at Walmart for $245! I actually bought one of these on eBay - figured I'd get a dewar and fill it with O2 from a welding supply place, then transfer to the Helios at the trailhead- but the Helios turns out to have a complex interlock system and to fill it you have to buy a much more expensive supply system (also from Helios, of course).
Back in grad school I used to handle liquid N2 and O2 all the time. Yeah, you have be be careful to avoid ice plugs - also asphyxiation from N2 and accelerated combustion from O2 - but it doesn't have to be all that complicated.
So here's a design challenge: a lightweight cryogenic O2 pack, with simple refill capability. For us weekend mountaineers.
by Scott » Mon Feb 04, 2019 6:59 am
One idea that we currently have a prototype of is a backpacking stove that burns hotter in low oxygen/cold environments than what is currently available. Is cooking at altitude an area that could be improved for you as a high-altitude climber?
by ExcitableBoy » Wed Feb 06, 2019 6:05 pm
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