Page 1 of 2 12 LastLast
Results 1 to 10 of 19
  1. #1
    Senior Member Danalex's Avatar
    Join Date
    Nov 2010
    Location
    Ottawa Canada
    Hammock
    2011 Chrysalis
    Tarp
    BlackCat dbl poles
    Insulation
    Phoenix
    Suspension
    DIY web and cinch
    Posts
    505

    Heated Camping Pad

    Crazy idea ... anybody know if it works??

    http://www.backcountrygear.com/catal...il.cfm/POE1065

    I see using it for moto camping and plugging it into the bike's main battery.
    "Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles"
    Hunter S. Thompson

  2. #2
    Senior Member stairguy's Avatar
    Join Date
    Aug 2009
    Location
    Shakopee, Minn.
    Hammock
    exped scout combi
    Tarp
    superfly
    Insulation
    polarpod
    Posts
    545
    Would probably work, but I think you would probably be better suited w/a UQ. Consider travlin on a bike, proximity you can park to trees, flexability of system. JIMO
    " Wiggs "

    ________________________________________

  3. #3
    Black Wolf's Avatar
    Join Date
    Jan 2011
    Location
    Merritt Island, Fla.
    Hammock
    One of Eight
    Tarp
    Cuban Baby !!
    Insulation
    I'm Down
    Suspension
    MYOG, whoopies
    Posts
    956
    Images
    74
    Interesting...a bit heavy...I didn't see that 12v powers it...for that matter...what powers it...batteries???..even more weight...unless you're carrying it in the back of your truck...but something in extreme cold that's generating a heat source would be niiiiicce !!

  4. #4
    Senior Member CajunHiker's Avatar
    Join Date
    Dec 2007
    Location
    Louisiana
    Hammock
    Hennessey Expedition Asym
    Tarp
    Hennessey Hex
    Insulation
    BA Yampa, Exped 7s
    Suspension
    Dynaglide Whoopies
    Posts
    435
    Images
    32
    http://www.trailspace.com/gear/pacif...ulmat-hot-pad/
    One review says 4AA, one says 6AA. Auto temperature controlled thermostat.
    To Boldly Hang Where No One Has Hung Before...

  5. #5
    Black Wolf's Avatar
    Join Date
    Jan 2011
    Location
    Merritt Island, Fla.
    Hammock
    One of Eight
    Tarp
    Cuban Baby !!
    Insulation
    I'm Down
    Suspension
    MYOG, whoopies
    Posts
    956
    Images
    74
    Quote Originally Posted by CajunHiker View Post
    http://www.trailspace.com/gear/pacif...ulmat-hot-pad/
    One review says 4AA, one says 6AA. Auto temperature controlled thermostat.
    That answers that...well sorta' ..LOL..

  6. #6
    Senior Member Crash's Avatar
    Join Date
    Oct 2006
    Location
    Pburg, NJ (On the Delaware River)
    Hammock
    3 gathered ends
    Tarp
    JRB Hex
    Insulation
    Jacks R Better
    Suspension
    Whoopies
    Posts
    416
    Images
    7

    Hot pad

    4 or 6 aa batteries is still not bad to alleviate C.B.S.

  7. #7
    Senior Member Danalex's Avatar
    Join Date
    Nov 2010
    Location
    Ottawa Canada
    Hammock
    2011 Chrysalis
    Tarp
    BlackCat dbl poles
    Insulation
    Phoenix
    Suspension
    DIY web and cinch
    Posts
    505
    Quote Originally Posted by stairguy View Post
    Would probably work, but I think you would probably be better suited w/a UQ. Consider travlin on a bike, proximity you can park to trees, flexability of system. JIMO
    I was thinking about putting it in my BA bag along with my UQ for very cold nights just to take the edge off. Not for every night unless you carried a solar charger.
    "Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles"
    Hunter S. Thompson

  8. #8
    Senior Member
    Join Date
    Aug 2009
    Location
    Granite Falls,Wa
    Posts
    224
    6 Lithium AA batteries weigh about 3oz. If it truly lasted 8 hours (doubt it) why is this not selling like the next apple I gizmo?

  9. #9
    Senior Member Danalex's Avatar
    Join Date
    Nov 2010
    Location
    Ottawa Canada
    Hammock
    2011 Chrysalis
    Tarp
    BlackCat dbl poles
    Insulation
    Phoenix
    Suspension
    DIY web and cinch
    Posts
    505
    good question .. I might pull he trigger just to try it out.
    "Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles"
    Hunter S. Thompson

  10. #10
    Senior Member XexorZ's Avatar
    Join Date
    Sep 2009
    Location
    Norther Idaho
    Hammock
    WBBB 1.7 DL
    Tarp
    Mosq. Camo Dimond
    Insulation
    US GI MSS
    Suspension
    WBBB Stock webbing
    Posts
    701
    Images
    8
    Quote Originally Posted by CajunHiker View Post
    http://www.trailspace.com/gear/pacif...ulmat-hot-pad/
    One review says 4AA, one says 6AA. Auto temperature controlled thermostat.

    If we assume 6 AA lets do a thought experiment.

    Lets assume the numbers here are correct:
    http://www.allaboutbatteries.com/Energy-tables.html

    The best-of-class battery holds 9360 joules of energy. * 6 is ~56K joules or 56K Watt-Seconds. Divide that by 60 and then 60 again to get watt hours, which is about 15.5 Watt-Hours. So, you can get 15.5 Watts of heat out of this for about an hour, 31 watts for 1/2 hour... Lets assume you want to sleep for say 6 hours and lets assume it is setup to dribble out the heat over this amount of time. That means its only putting out 15.5 / 6 or a bit over 2.5 watts of heat continuously over this period of time (not so good).

    Considering a body at rest puts out somewhere around 100 Watts at rest this means a 2.5% increase in heating capability over these 6 hours. This is pretty insignificant as a small amount of insulation can help conserve much more than this!


    For comparison:
    A BTU (British thermal unit) is characterized as the amount of energy it takes to raise the temperature of 1 pound of water 1 degree F. It equals about 1050 joules. With these numbers in mind and a little math we can figure out how much hot water it would take to equal the heating capability of the above system which we said stors 56K joules.

    56000 / 1050 = ~53 BTU.

    Now lets assume your "hot water" is still helping you out as long as it is warmer than you are - so lets just say anything over 100F. Lets also assume we're not going to heat it to a boil, just to 200F (a convenient 100F delta). So we would need to heat 1 pound of water 53deg F above 100F (153F) to get the same energy... or about 0.53 pounds of water heated to 200F. So how much water is that? Welp water weighs about 8.3 pounds per gallon so we're talking about 0.53 / 8.3 or 0.063 gallons of water OR almost exactly 8 ounces of water.

    (YES - 8 lousy ounces).

    So...

    That means, to get the same heating (if my math isn't entirely off) all you need to do is heat 8 ounces of water to near boiling, seal it in a good container and then in a sock for "slow release" and viola! You have the same amount of heating this system can produce. Double the amount of water and you've doubled the amount of heat it can put out.

    It should be noted I sleep with 32 ounces of hot water and find it "adequate" for keeping my tootsies warm on those super snotty days. With that said, I would likely find this system approximately "1/4 adequate" - which is 3/4 shy of adequate

    Neat idea, but battery technology just isn't there yet.

    [stuffy math rant over]

    X

    [EDIT: Somebody check my maths - been drinking taddy porter so who knows!! I know I dropped some decimal points but this isn't meant to be super accurate just really close lol]
    Last edited by XexorZ; 01-22-2011 at 21:17.
    Buy Tea at Jennifer's Tea Garden ( My Wife's Place )

Similar Threads

  1. Let's have a heated discussion...
    By DaddyDaddy in forum General Hammock Talk
    Replies: 11
    Last Post: 01-04-2014, 21:40
  2. Heated tarp for winter
    By Rapt in forum Weather Protection
    Replies: 4
    Last Post: 10-05-2011, 07:37
  3. Warm Heated Coat
    By Wintec in forum General Hammock Talk
    Replies: 3
    Last Post: 05-21-2011, 08:58
  4. A heated hammock from this material?
    By nogods in forum General Hammock Talk
    Replies: 13
    Last Post: 11-17-2007, 04:55

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •