Gallery Video Directory Hammock Articles Donate Hammock Forums Store Today's Posts Mark Forums Read
 Hammock Forums - Elevate Your Perspective DIY Underquilt Calculations
 Home Forums Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

 08-26-2011, 15:35 #2 MAD777     Join Date: May 2009 Location: South Florida Hammock: DIY, WBBB & Switchback Tarp: HG cuben,OES Spinn Insulation: DIY down 3/4 UQ/TQ Suspension: Dynaglide & Dutch View my gallery 39 Posts: 8,240 Images: 39 Nice work! Check the formula in cell B20. I think you meant to add the baffle height twice, once for each end of the quilt. Also, in cell B22, why not simply divide the inner shell width (44") by the number of baffles (8)? Check the outer baffle spacing as well. I'm not sure why the seam allowance is getting added to the baffle spacing in cells B24-27? I like this neat format. I wish my calcs were this neat. __________________ Mike "Life is a Project!"
08-26-2011, 15:58   #3
Meteor
Member

Join Date: Jan 2010
Location: Olathe, KS
Hammock: DIY "warbird"
Tarp: DIY cat cut silnyl
Suspension: Whoopie slings
Posts: 98
Quote:
 Originally Posted by MAD777 Nice work!
Thanks! And thank you for the formula!

Quote:
 Check the formula in cell B20. I think you meant to add the baffle height twice, once for each end of the quilt.
You are correct - I changed it so that it multiplies all seam allowances by 2 to correct for the fact that (duh) you have seams on both ends.

Quote:
 Also, in cell B22, why not simply divide the inner shell width (44") by the number of baffles (8)? Check the outer baffle spacing as well.
Not sure why I didn't just divide the inner shell in that way, but I've changed it. I think I either misinterpreted something the other thread or it may have been a copy/paste error on my part. Corrected.

Quote:
 I'm not sure why the seam allowance is getting added to the baffle spacing in cells B24-27?
I added the seam allowances to the outside baffle chambers thinking that people may want to mark a line up to their seam allowance inside the long edges of the fabric for the outside chambers. However, since there is no baffle divider (nothing to divide) and the edges of the fabric are simply sewn together maybe it doesn't make sense?

 08-26-2011, 17:13 #4 Catavarie Needs more Hang time     Join Date: Apr 2011 Location: Durham, NC Hammock: LeanGreen/BigRed/DIY Tarp: CatCut Hex/GG12 Insulation: Fur I grow myself Suspension: Of Disbelief View my gallery 3 Posts: 3,579 Images: 3 While not a math geek, I would to applaud your efforts in putting this together. So I'm guessing this is for a paralellogram UQ and not a trapezoidal shaped? __________________ *Heaven best have trees, because I plan to lounge for eternity. Good judgement is the result of experience and experience the result of bad judgement. - Mark Twain Trail name: Radar 2014 Smoked Butt Hang Planning Thread | Sign up Sheet
 08-27-2011, 16:00 #5 Meteor Member     Join Date: Jan 2010 Location: Olathe, KS Hammock: DIY "warbird" Tarp: DIY cat cut silnyl Suspension: Whoopie slings Posts: 98 Yes, I would say that is accurate. However it should be of some use to those building trapezoidal UQs in that the derivations for the trapezoid could be calculated afterward, or could be added to the sheet.
 09-22-2011, 19:30 #6 normis1     Join Date: Jan 2011 Location: Kensington, MD Hammock: Speer DIY, WBBB Tarp: Speer DIY Insulation: Crowsnest, Burrow Suspension: Whoopie Slings Posts: 157 Hey Meteor - on the spreadsheet, does "Baffle Height" equate to loft, or is that actually intended to be the "finished" height of the baffle? Thanks for posting this, by the way. Very useful. __________________ - Norm
09-22-2011, 19:41   #7
Catavarie
Needs more Hang time

Join Date: Apr 2011
Location: Durham, NC
Hammock: LeanGreen/BigRed/DIY
Tarp: CatCut Hex/GG12
Insulation: Fur I grow myself
Suspension: Of Disbelief
View my gallery 3
Posts: 3,579
Images: 3
Quote:
 Originally Posted by normis1 Hey Meteor - on the spreadsheet, does "Baffle Height" equate to loft, or is that actually intended to be the "finished" height of the baffle? Thanks for posting this, by the way. Very useful.
It is the hieght of the sewed baffle, not neccessarily the loft as the amount of fill can vary that. I beleive most people figure the baffles to be around an inch shorter than the final loft with around 20% overfill.
__________________
*Heaven best have trees, because I plan to lounge for eternity.

Good judgement is the result of experience and experience the result of bad judgement. - Mark Twain

 09-23-2011, 06:59 #8 normis1     Join Date: Jan 2011 Location: Kensington, MD Hammock: Speer DIY, WBBB Tarp: Speer DIY Insulation: Crowsnest, Burrow Suspension: Whoopie Slings Posts: 157 Got it - thanks Cat. __________________ - Norm
 11-06-2011, 22:26 #9 gt7599a Member     Join Date: Mar 2011 Location: Asia Hammock: Gathered End w bugnet Tarp: DIY WinterDream Insulation: 3" Down DIY UQ&TQs Suspension: whoopie slings View my gallery 4 Posts: 86 Images: 4 @Meteor, thanks for the venue to share calculations. I've taken the liberty of adding a second sheet with formulas for a trapezoidal under quilt for bridge hammocks. -Ed Last edited by gt7599a; 11-06-2011 at 22:45.. Reason: correct unclear wording for better clarity
 11-07-2011, 08:17 #10 Jazilla     Join Date: Oct 2006 Location: Carencro, Louisiana Hammock: DIY GE Tarp: Superfly Insulation: 20* zepplin/DIY TQ Suspension: Straps View my gallery 108 Posts: 2,024 Images: 108 Thank you Meteor and gt7599a for the calculations. Thanks for putting it together and making it easy. __________________ Yosemite Sam: Are you trying﻿ to make me look a fool? Bugs: You don't need me to make you look like a fool. Yosemite Sam: Yer deerrrnnn right I don't!

 Bookmarks

 Tags baffle, calculations, diy, down, radial, underquilt, volume

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Site Topics     Introduce Yourself     Announcements     Feedback and suggestions     Articles Hammock Camping     General Hammock Talk         Long distance travel with a hammock     Suspension Systems, Ridgelines, & Bug Nets     Top Insulation     Bottom Insulation         Pads         Under Quilts     Weather Protection     Do-It-Yourself (DIY)         Fabrics         DIY Stickies Outings     Hangouts, Campouts, and Trip Planning         Northeast         Southeast         Midwest         Southwest         West         All Others     Trip Reports Marketplace     For Sale         Group Buys         Pay it Forward         [SOLD] items no longer available     For Trade         [TRADED] Items no longer available     Want to Buy Hammock Gear - Manufacturers and Services     Reviews     Other Vendors and Services     Arrowhead Equipment (Home of Kick Ass Quilts)     Butt in a Sling Hammock Gear     Clark Jungle Hammocks     Claytor Hammocks     DD Hammocks     Dream Hammock     Dutchware     Eagles Nest Hammocks     Grand Trunk     Hammock Gear     Hennessy Hammocks     2QZQ Hammock Specialties (Hennessy Bugnet Zipper Mods)     Jacks-R-Better     Molly Mac Gear     OES Tarps     Tree to Tree Trail Gear         Speer Hammocks     Trek Light Gear     UGQ Outdoor Equipment     Warbonnet Hammocks     Whoopie Slings     Wilderness Logics

All times are GMT -5. The time now is 15:22.