If I put 2 x summer sleeping bags one inside the other will this increase the "R" rated value of said bags. Likewise if I make a foam mat and Tin foil sandwich will this cut down further on conduction, any thoughts OH WISE ONES."R" Ratings on your sleeping systems ?
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If I put 2 x summer sleeping bags one inside the other will this increase the "R" rated value of said bags. Likewise if I make a foam mat and Tin foil sandwich will this cut down further on conduction, any thoughts OH WISE ONES.
Yes.
Likewise if I make a foam mat and Tin foil sandwich will this cut down further on conduction, any thoughts OH WISE ONES.
No it'll increase conduction, but reflect radiation.
There's a formula for pairing up bags like this on the web somewhere, I think it's something like half the rating of the lightest (coolest) bag is added to the value of the warmest bag ....
Bag 1 = 30 degrees rating (coolest)
Bag 2 = 10 degrees rating (warmest)
Half the 30* = 15*
10* + 15* = 0.5* combined rating (not 25* as that's making the combination cooler)
I've probably got that wrong so best to check it before setting out. No idea on the foil thing, I'd say it'll probably reflect your heat back towards you but I don't know how effective it is. I know some folk use those windscreen reflectors as mats, with the silver side up I think, bad for condensation though.
Bag 1 = 30 degrees rating (coolest)
Bag 2 = 10 degrees rating (warmest)
Half the 30* = 15*
10* + 15* = 0.5* combined rating (not 25* as that's making the combination cooler)
I've probably got that wrong so best to check it before setting out. No idea on the foil thing, I'd say it'll probably reflect your heat back towards you but I don't know how effective it is. I know some folk use those windscreen reflectors as mats, with the silver side up I think, bad for condensation though.
why not just say bollox to it and get your self a pritty little miss to warm said sleeping bags up before u get in and then u will at least have something to cuddle in the night
are well there is your first mistake KIDS cos me dont have and dont want kids and the little miss is a work in progress cos did have one till she went off with some other bloke
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