Re: Winter Warmth Theory
- I have a feeling that once you get all snuggled up in your quilt and
pads and hats and all, that you end up losing a lot of warmth through
your breath. So rebreathing warmer, humidified air like in a hard
top would help with that. Plus, that warmer air would be all over
the top of your top quilt, helping reduce the amount of heat coming
up thru the quilt. Very similar to tent vs bivy - good analogy. Of
course, you could easily get lots of moisture problems under the hard
top, as others have noted.
Bill in Houston
--- In firstname.lastname@example.org, "Debra Weisenstein"
> Anyone have a theoretical argument whether a hammock sock or a hard
> top should be warmer? The difference being that the hammock sock
> directly against the sleeping bag, enclosing the hammock top andincreasing the
> bottom, while the hard top is suspended overhead with a ridgeline.
> Potentially also the hammock sock may not cover the head, but that
> would be another issue. So I guess the question is, does
> amount of still air around you increase warmth? Or mean that theair
> inside can move around more and thus decrease warmth? Or does itall
> depend on conditions? I've generally found sleeping in a tent tobe
> warmer than sleeping in a bivy sack, which would argue for the hardtop
> to be warmer - maybe more distance between the outside of yourinside the
> sleeping bag and and the moving outside air.
> --- In email@example.com, "jwj32542" <jwj32542@y...>
> > --- In firstname.lastname@example.org, "Ed Speer" <ed@s...>
> > > has anyone tried
> > > to measure humidity/dew point & compare it to temperature
> > hammockwas
> > > or inside their gear?
> > I don't have the humidity numbers, but my hammock sock was about
> > warmer than outside when I closed it up around me...coldest night
> > about 40F, IIRC. I didn't have any condensation inside eventhough I
> > was breathing into it, but I could definitely tell a differencewhen I
> > opened it up. Not sure I'd want that in below freezing temps.
> > Jeff