by phydeux » Sun Dec 27, 2009 3:49 am
by EManBevHills » Fri Jan 01, 2010 9:01 pm
by OJ Loenneker » Sun Jan 03, 2010 12:44 am
Never had any problem with a bic at 14k
by Day Hiker » Mon Jan 04, 2010 12:23 pm
OJ Loenneker wrote:Yep, me neither. I always can get that summit smoke lit... Just make sure that you keep the bic in your pocket, usually the one closest to your base layer, that way it will be nice and warm, and the butane will boil and make gas so you can light it. If the bic is too cold, it will not let the liquid butane boil, and therefore you will have no gas to light. I believe that butane boils at 40ºF, at atmosphereic pressure (14.5 PSIA) so you gotta keep it pretty warm.
by nhluhr » Mon Jan 04, 2010 6:29 pm
by EManBevHills » Wed Jan 06, 2010 5:08 pm
by mconnell » Thu Jan 07, 2010 3:53 pm
EManBevHills wrote:Interesting read, that cigar thread. Thanks for the suggestions.
But as Wharf Rat on cigarassylum stated:
"Since the orifice (hole) size for the lighter is fixed, a higher pressure means that the flow rate through the orifice will be greater. For a flame to establish and hold on the orifice, the velocity of the fuel must lie in the correct range. If the higher pressure increases the velocity too much, the flame will "blow off."
As my primary concern is altitude rather than extreme cold, the ability to adequately regulate fuel flow appears paramount...
Keeping at least one lighter along with a camera battery in my inside jacket pocket has dealt with the temp issue so far.
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