380RE: Hammock Camping Re: Bottom Quilt for HH...
- Jan 30, 2003
MessageMy feelings too, Debra. I assume the Cunningham/Burton table refered to 'stay-alive' temps, not the 'toasty warm' temps I need for comfortable sleep. Your experience in cold temps confirms this. Your table is more in line with what I'd recommond to others. Thanks for compiling it. I too have culled sleeping bag manufacturer's bag ratings, but also find them too optimistic. Although I'm still collecting data, my numbers for recommended hammock bottom insulation are probably going to be very close to yours....Ed
I don't believe the Cunningham/Burton table. At least it sure
wouldn't work for me. Here's a sleeping table put together from my own
experience and by checking some sleeping bag loft vs temperature
ratings (but watch out for manufacturer's rating - they can be way
off). I may sleep colder than alot of people, but I've been winter
camping in New England for years and know what works for me down to
-26F. This assumes minimal clothing inside the sleeping bag but use
in a tent or other environment protected from wind.
Temp. Sleeping Bag Loft Single Thickness
40 3-3.5 1.5-1.75
30 4 inches 2.0
20 5.5 2.75
10 6-6.5 3-3.25
0 7 3.5
-10 7.5-8 3.75-4
-20 8-9 4-4.5
> Gerry Cunningham in "Light Weight Camping Equipment and How to Make
> ed. page 117 quotes a table from A.C. Burton, "Man in a Cold
> Williams & Wilkins Co., 1955. which gives the required thickness
from skin to
> the outer garment layer.
> Temp. Sleeping Light Work Heavy Work
> 40°F 1.5" 0.8" 0.20"
> 20°F 2.0" 1.0" 0.27"
> 0°F 2.5" 1.3" 0.35"
> -20°F 3.0" 1.6" 0.40"
> -40°F 3.5" 1.9" 0.48"
> -60°F 4.0" 2.1" 0.52"
> I have tried and failed to find the original work.
> Bill Murdoch
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