Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 39
  1. #21

    Join Date
    May 2010
    Location
    West Stockbridge, MA
    Hammock
    WBBB 1.1dbl
    Tarp
    MacCat
    Insulation
    Yeti Mamba
    Suspension
    Whoopies
    Posts
    86
    Images
    3
    All this discussion has me thinking "fish net stockings". I apologize as I am not only new to hanging but not very sophisticated as well.

  2. #22
    New Member matto's Avatar
    Join Date
    Apr 2010
    Location
    Upstate NY
    Hammock
    WBBB 1.0 dbl/DIY
    Tarp
    OES std/DD Hattarp
    Insulation
    Burrow & CrowsNest
    Suspension
    Webbing/Whoopies
    Posts
    49
    Images
    1
    Maybe something like the "Astro Foam Sleeve"?

    I've only ever seen these in asian supermarkets -- usually on the asian pears -- but maybe there's a way to source whole sheets of it. Either that or order a gross of the sleeves and get out the scissors and glue.

  3. #23
    Senior Member pedro's Avatar
    Join Date
    Feb 2008
    Location
    Wilmington, DE
    Hammock
    DIY Speer-type
    Tarp
    modded SG 12' x12'
    Insulation
    CCF and DAM
    Suspension
    whoopie slings
    Posts
    828
    Images
    2
    Quote Originally Posted by matto View Post
    Maybe something like the "Astro Foam Sleeve"?

    I've only ever seen these in asian supermarkets -- usually on the asian pears -- but maybe there's a way to source whole sheets of it. Either that or order a gross of the sleeves and get out the scissors and glue.
    Good thinking! How about taking EVA headliner foam and punching a diamond pattern in it?
    "Interesting! No, wait, the other thing.....tedious!"- Bender Bending Rodriques

  4. #24
    Senior Member Albert Skye's Avatar
    Join Date
    Jun 2009
    Location
    coastal B.C.
    Hammock
    DIY (&c.)
    Posts
    378
    Quote Originally Posted by Stovemandan View Post
    What thickness of foam sheet are you thinking of expanding 1/8"?

    1" O.D. leather punch will work. Affix it to a hammer handle and whack away.

    I would think slits would just compress sideways
    I like expanded mesh because it makes zero waste. I've not converged on any specific dimensions yet. Much depends on the properties of the material and the dimensions of the slits.

    Another method is to make a simple net of narrow, twisted strips (i.e., the twisting yields an effective diameter similar to the width of the strip, reduces the tendency to flatten, and reduces conductive thermal loss).

  5. #25
    Senior Member Stovemandan's Avatar
    Join Date
    Oct 2009
    Location
    Rockford, IL
    Hammock
    GrizzBridge
    Posts
    664
    I have some working knowledge of greenhouse insulation using air gap between layers of panes of glass. A minmum gap of 1/2 inch is recommended and 3/4" is ideal.

    Should we apply those dimensions in regards to insulation with foam sheets? I say, yes. Use 1/2" high density foam sheet and perforate with 1" diameter leather punch or hole saw. Holes staggered, 1" apart to prevent collapse of air space.

    http://en.wikipedia.org/wiki/Insulated_glazing

    Thermal performance

    The maximum insulating efficiency of a standard IGU is determined by the thickness of the space containing the gas or vacuum. Too little space between the panes of glass results in conductive heat loss between the panes (the inside surface of one pane cools the surface of the other pane) while too wide a gap results in convection current losses (gas begins to circulate because of temperature differences and transfers heat between the panes). For further information, see the article heat flow. Typically, most sealed units achieve maximum insulating values using a gas space of between 5/8 to 3/4 (1619 mm) when measured at the centre of the IGU. When combined with the thickness of the glass panes being used, this can result in an overall thickness of the IGU of between 7/8 and 1 for 3 mm glass (2225 mm) to 1 (2831 mm ) for 1/4 plate glass.
    Coming soon: Fancee Feest teams up with "El Conquistador"

  6. #26
    Senior Member turnerminator's Avatar
    Join Date
    Sep 2009
    Location
    Peterborough,UK
    Hammock
    DIY Pertex
    Tarp
    DIY with doors on
    Insulation
    Down and synthetic
    Suspension
    Whoopies & hooks
    Posts
    1,339
    Quote Originally Posted by matto View Post
    Maybe something like the "Astro Foam Sleeve"?

    I've only ever seen these in asian supermarkets -- usually on the asian pears -- but maybe there's a way to source whole sheets of it. Either that or order a gross of the sleeves and get out the scissors and glue.
    Ive seen plates and mugs wrapped in this same stuff from department stores. Its been in sheet form, not tubes.

  7. #27
    Senior Member Albert Skye's Avatar
    Join Date
    Jun 2009
    Location
    coastal B.C.
    Hammock
    DIY (&c.)
    Posts
    378
    Quote Originally Posted by Stovemandan View Post
    A minmum gap of 1/2 inch is recommended and 3/4" is ideal.
    A 3/4" gap may give better performance than a smaller one but foam is a much better insulator than glass. Also, I imagine gravity (i.e., vertical rather than horizontal orientation) informs those dimensions.

    I'm operating under the assumption (based on discussions about Insultex) that the foam is providing an insulated membrane and the primary purpose of separating the layers is to reduce conductive heat loss through direct contact of the layers. I imagine the separation distance between layers increases in significance with the thermal conductivity of the membrane; i.e., with insulated membranes, even the slightest air gap gives good results.

    A very thick separation layer would add significant weight and volume; I think it's better to use down or inflation if one needs that much loft. However, my aim is to use differential construction to support a larger gap than the separation layer, which is essentially a backup for areas where the two layers would otherwise come together.
    Last edited by Albert Skye; 08-11-2010 at 13:39.

  8. #28
    New Member Hamper's Avatar
    Join Date
    Mar 2010
    Location
    Johnson City, TN
    Hammock
    HH Exped
    Tarp
    Chinook 12' x 9'6"
    Insulation
    Exped Synmat 7
    Suspension
    Rings/garda hitch
    Posts
    41

    Questions about Insultex

    I hope this isn't too far off topic, but this thread brought up some questions that my feeble little mind couldn't answer by reading the multitude of threads on Insultex.

    I'm thinking of getting a Claytor JH. I like the double layer feature to hold a sleeping pad, but I was wondering if I could also just put some Insultex between the layers. This thread makes it seem like I would have to make sure there were multiple layers and some kind of separation of those layers. Is this a viable option for three season bottom insulation?

    If it works, couldn't I just keep the Insultex layers inside the sleeve even when I pack the hammock, making a separate stuff sack unnecessary?

    Would Insultex do anything for me if, heaven forbid, I ever had to go to the ground in bivy mode? I'm sure it wouldn't give me as much comfort padding wise, but would it still keep my fanny warm(ish)?

    Is there any way to buy small amounts of the stuff to try it out? If so, where can I get it?

    Thanks!

  9. #29
    Senior Member Stovemandan's Avatar
    Join Date
    Oct 2009
    Location
    Rockford, IL
    Hammock
    GrizzBridge
    Posts
    664
    Quote Originally Posted by Albert Skye View Post

    Using a separate layer of expanded mesh made from foam sheet seems promising. It's labour-intensive (though easily tooled once the dimensions are optimised) but I think it would work well.

    Alternatively, the layers could be separated with a replaceable air bladder (plastic bag), .
    Your original idea will work the best.
    Coming soon: Fancee Feest teams up with "El Conquistador"

  10. #30
    Member
    Join Date
    Jan 2010
    Location
    Lehi, UT
    Hammock
    DIY, WBBB
    Tarp
    GG, DIY
    Insulation
    CCF + 40* mummy
    Suspension
    Amsteel UCR
    Posts
    83
    Images
    8

    inflatable bladder option?

    Thinking air bladder, what about something like this http://www.balloonbed.com/

    you could make the channels fairly broad so you only need a few balloons. The problem with this setup in the past is that you have to have lots of balloons since they actually provide the insolative layer as well and they are not great insulators, but if you used ix as the two outer layers you could get away with fewer balloons. If like me you can blow them up without a pump, then it is even lighter. I would start with 260s instead of 350s since I think the large width is not as important here as if you were laying on the ground. Since they use 7 balloons in a full pad I would guess you could get away with 3. Hey Mac, you got a few yds. of insultex for sale, I may have to try this.
    Share files across all your devices with Dropbox (that's where I keep my Hangin' pics)
    https://www.dropbox.com/referrals/NTU3OTM3ODc5

Similar Threads

  1. PolyCro Sheets
    By tgbrowning in forum Do-It-Yourself (DIY)
    Replies: 5
    Last Post: 12-21-2012, 10:51
  2. SOLD: 2 wide sheets of 1/4" Minicell Foam
    By KP in forum [SOLD/WITHDRAWN] Items no longer available
    Replies: 4
    Last Post: 01-06-2012, 10:21
  3. Wait, what about my bed sheets?
    By Paladin03 in forum Warbonnet Hammocks
    Replies: 20
    Last Post: 02-20-2011, 13:49
  4. sleeping sheets
    By LyttleBryan in forum General Hammock Talk
    Replies: 11
    Last Post: 10-22-2009, 13:47
  5. Neat sheets
    By tnhillbilly in forum General Hammock Talk
    Replies: 5
    Last Post: 12-30-2007, 21:37

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
  •