Backcountry Forum

Make Your Own Gear

Amazon.com
Backpacking Forums
BackcountryGear.com
backcountry gear

---- Our Gear Store ----
The Lightweight Gear Store
 
 WINTER CAMPING 

Shelters
Bivy Bags
Sleeping Bags
Sleeping Pads
Snow Sports
Winter Kitchen

 SNOWSPORTS 

Snowshoes
Avalanche Gear
Skins
Hats, Gloves, & Gaiters
Accessories

 ULTRA-LIGHT 

Ultralight Backpacks
Ultralight Bivy Sacks
Ultralight Shelters
Ultralight Tarps
Ultralight Tents
Ultralight Raingear
Ultralight Stoves & Cookware
Ultralight Down Sleeping Bags
Ultralight Synthetic Sleep Bags
Ultralight Apparel


the Titanium Page
WM Extremelite Sleeping Bags

 CAMPING & HIKING 

Backpacks
Tents
Sleeping Bags
Hydration
Kitchen
Accessories

 CLIMBING 

Ropes & Cordage
Protection & Hardware
Carabiners & Quickdraws
Climbing Packs & Bags
Big Wall
Rescue & Industrial

 MEN'S APPAREL 

Jackets
Shirts
Baselayer
Headwear
Gloves
Accessories

 WOMEN'S APPAREL 

Jackets
Shirts
Baselayer
Headwear
Gloves
Accessories

 FOOTWEAR 

Men's Footwear
Women's Footwear

 CLEARANCE 

Backpacks
Mens Apparel
Womens Apparel
Climbing
Footwear
Accessories

 BRANDS 

Black Diamond
Granite Gear
La Sportiva
Osprey
Smartwool

 WAYS TO SHOP 

Sale
Clearance
Top Brands
All Brands

 Backpacking Equipment 

Shelters
BackPacks
Sleeping Bags
Water Treatment
Kitchen
Hydration
Climbing


 Backcountry Gear Clearance


Stay Healthy--Eat Well

MARY JANES FARM ORGANIC MEALS

Mary Janes Farm Organic Backcountry Meals

NATURAL HIGH GOURMET MEALS

Natural High

 

Topic Options
Rate This Topic
#89137 - 02/06/08 07:43 AM Dome Tent Formula
Christian Offline
member

Registered: 01/11/02
Posts: 106
Hey everyone,
after a long time fiddling with it I'm kinda proud to present my spreadsheet which calculates the fabric pattern of dome tents. It is based on the poles being parabolas which works pretty well for tents in the "usual" sizes.

The spreadsheet is in .ods format and can be opened with open office.

Download here:
ZELTFORMEL

Quick- Manual:
You enter your basic tent measurements in the upper left hand corner.
You will then get two sets of coordinates(X1/Y1 and X2/Y2). These represent the fabric patterns along the width and the length of the tent. The zero/zero is at the apex of the tent.
Hope someone has any use for it,

Christian Wagner

Top
#89138 - 02/06/08 02:47 PM Re: Dome Tent Formula [Re: Christian]
Rick Offline
member

Registered: 05/10/04
Posts: 708
Loc: Ontario, Canada
I'd be intersted in veiwing this speadsheet but I don't have Open Office.

What is it? Where can I get it (freeware)? Do I have any other options?

Thanks

Top
#89139 - 02/06/08 02:58 PM Re: Dome Tent Formula [Re: Rick]
tcrace Offline
newbie

Registered: 04/22/07
Posts: 2
Loc: Portland, Oregon
Quote:
I'd be intersted in veiwing this speadsheet but I don't have Open Office.

What is it? Where can I get it (freeware)? Do I have any other options?

Thanks


Yep, Open Office is a free office suite that you can download from the openoffice.org site.

Top
#89140 - 02/07/08 04:28 AM Re: Dome Tent Formula [Re: Christian]
TurkeyBacon Offline
member

Registered: 10/04/02
Posts: 524
Loc: Boston
Sweet!!!
Just what we needed, someone who likes to sew and knows computer programing.
I actually do have a question... With out looking at the program yet, can it tell you the inner tent and outer tent? For instance, the inner tent hangs 2? inches below the poles.
Thanks for posting it. While I do not have a use for it, I could come up with a use for it.
Scott
_________________________
I had superhuman powers, but my therapist took them away.

Top
#89141 - 02/07/08 07:23 AM Re: Dome Tent Formula [Re: Christian]
Kate Offline
member

Registered: 01/14/08
Posts: 45
Loc: On top of the North Downs, UK
Ooh! Smashing!

<Kate envisions teaching son's scout group to make tents... >
_________________________
Kate XXXXXX
Mad sewing witch!
http://www.katedicey.co.uk

Top
#89142 - 02/09/08 07:19 AM Re: Dome Tent Formula [Re: TurkeyBacon]
Christian Offline
member

Registered: 01/11/02
Posts: 106
You would let the computer calculate two different tents. The first, the outer tent is bigger, the other tent would simply be two inches smaller.
Before this spreadsheet I drew a very accurate picture of the tent and took my measurements from there. The problem was that it would take forever and if you dicided half way that you wanted your tent two inches higher, you would have to start allover again. Now every dome tent you could imagine is just a couple of keypresses away.

One of my earlier tents (done by "hand")could be viewed here:

tent
The method was basically the same, just not computerized.

Top
#89143 - 02/09/08 09:22 AM Re: Dome Tent Formula [Re: Christian]
DJ2 Offline
member

Registered: 01/06/02
Posts: 1347
Loc: Seattle, WA
I could use some help getting started.

I downloaded open office.

When I click on your link I get a page showing a lot of info (not a spreadsheet). It shows, for example, folders labeled configurations, Meta-inf, Pictures, etc.

Where do I go from there?

Top
#89144 - 02/11/08 06:25 AM Re: Dome Tent Formula [Re: DJ2]
Christian Offline
member

Registered: 01/11/02
Posts: 106
Wow, I just realized that Windows somehow thinks that this is an archive- weird.

Hm, on my Linux system everything is ok.
The windows computer I'm working on right now doesn't open .ods files (Why the h*** couldn't MS office support totaly open, well documented document formats?).

You might get lucky if you rename the file to "*.ods" and then open it with open office (or MS excell with plugin if something like this exists....)


Edited by Christian (02/12/08 02:10 AM)

Top
#89145 - 02/11/08 02:07 PM Re: Dome Tent Formula [Re: Christian]
DJ2 Offline
member

Registered: 01/06/02
Posts: 1347
Loc: Seattle, WA
Thanks for trying. I'm already 3 skips above my computer skills and I was unable to do (or really understand) your suggestion here.

Oh well.

Top
#89146 - 02/12/08 02:20 AM Re: Dome Tent Formula [Re: DJ2]
Christian Offline
member

Registered: 01/11/02
Posts: 106
I made an Excel spreadsheet as well. Since I don't have Microsoft office I generated it with open office.

I cannot test it with Excel. Please tell me if it works and if you can get some use out of it.

If it won't work in Excel I'll find a computer with Microsoft Office on where I can convert the file properly.

Here is the link:
Zeltformel Excel

Top
#89147 - 02/12/08 08:04 AM Re: Dome Tent Formula [Re: Christian]
BrianKelly Offline
member

Registered: 04/18/07
Posts: 31
Loc: Alabama
Christian-
I haven't had a chance to play with it, but the program opened in excel no problem. I'll see if I can mess around with it at lunch today.

Thanks for sharing such a valuable tool! This ought to come in quite handy!

Top
#89148 - 02/12/08 08:13 AM Re: Dome Tent Formula [Re: Christian]
DJ2 Offline
member

Registered: 01/06/02
Posts: 1347
Loc: Seattle, WA
Opened easily and worked.

How wonderful!

Thanks!

Top
#89149 - 02/12/08 10:03 PM Re: Dome Tent Formula [Re: Christian]
billk Offline
member

Registered: 08/20/03
Posts: 1196
Loc: Portland, Oregon
Opened and seemed to work well. Thanks!

Top
#89150 - 02/15/08 11:16 AM Re: Dome Tent Formula [Re: Christian]
BrianKelly Offline
member

Registered: 04/18/07
Posts: 31
Loc: Alabama
Christian-
Thanks again for sharing this program with us! I finally took the time to play with it, and it seems pretty easy and straightforward.

One thing I was thinking about is how to use this with a trapezoidal instead of rectangular floor plan. Quickly trying to wrap my head around it, my thought was:

For X1/Y1 measurements (end panels of tent)
Head End (Wider): enter all dimensions and desired width of head end- use X/Y coordinates provided

Foot end (narrower): change width to match foot end width, all other specs stay the same- use new set of X/Y coordinates provided


For X2/Y2 measurements (long side panels of tent)
Length: Since you no longer have a rectangle, using the current input specs wouldn't work (the actual length of the tent side is longer). But all you need to do is determine the current length of the side (simple pythagorean theorum stuff):

(length of tent from step one)2 + (1/2*(head width-foot width))2 = (current length of side)2

(sorry, can't get it to superscript, so the "2" in each part is "squared")

A little calculator work and you are done. Does this sound about right to you?

Top
#89151 - 02/21/08 10:18 AM Re: Dome Tent Formula [Re: BrianKelly]
Christian Offline
member

Registered: 01/11/02
Posts: 106
Quote:
Christian-
Thanks again for sharing this program with us! I finally took the time to play with it, and it seems pretty easy and straightforward.

One thing I was thinking about is how to use this with a trapezoidal instead of rectangular floor plan. Quickly trying to wrap my head around it, my thought was:

For X1/Y1 measurements (end panels of tent)
Head End (Wider): enter all dimensions and desired width of head end- use X/Y coordinates provided

Foot end (narrower): change width to match foot end width, all other specs stay the same- use new set of X/Y coordinates provided


For X2/Y2 measurements (long side panels of tent)
Length: Since you no longer have a rectangle, using the current input specs wouldn't work (the actual length of the tent side is longer). But all you need to do is determine the current length of the side (simple pythagorean theorum stuff):

(length of tent from step one)2 + (1/2*(head width-foot width))2 = (current length of side)2

(sorry, can't get it to superscript, so the "2" in each part is "squared")

A little calculator work and you are done. Does this sound about right to you?


I think you might get by with your method. There is definitely a difference in length between the broad and the thinner side at the "corners", so the "big" panel sits a bit askiew in-between.
A few irregularities here and there are usually no problem and are compensated by fabric stretch.
But please keep in mind that this is definitely just an aproximation. While the spreadsheet- used for the intended purpose, a square tent- is accurate to the letter, using it for a tapered tent isn't. Please use a paper model and even a "cheap fabric prototype" before you sacrifice your expensive fabric.

BTW:
Not only square tents could be calculated with the spreadsheet, also polygonal dome tents (regular polygon)are possible.
The tent width is the length of one polygon segment, the tent lenght is two times the apothem of the polygon.
Then use the values of X1 and Y1 to cut out your fabric.

Top

Shout Box

Highest Quality Lightweight Down Sleeping Bags
 
Western Mountaineering Sleeping Bags
 
Lite Gear Talk - Featured Topics
Knife, Fire Starter, Ignition Source
by Jim M
12/11/17 07:34 PM
Bivvy bag with wired peak
by Petro1234
12/10/17 01:06 PM
How cheap can you go?
by EMT Dave
12/05/17 07:07 PM
Backcountry Discussion - Featured Topics
Greetings - and a question
by valongi
12/11/17 11:35 AM
Just found out about UCO candles
by toddfw2003
11/30/17 08:41 AM
Hitting the eagle rock loop, Ark in 3 days
by toddfw2003
11/19/17 11:31 AM
Make Your Own Gear - Featured Topics
Plant based insulation...
by billstephenson
11/18/17 02:58 PM
lightest grommets to use
by toddfw2003
10/22/17 06:13 PM
avalibility of thin ti rod
by the-gr8t-waldo
01/26/17 04:45 PM
Featured Photos
Breakneck Ridge, New York
May 2012 Eclipse, Lassen Park
New Years Eve 2011
Trip Report with Photos
Seven Devils, Idaho
Oat Hill Mine Trail 2012
Dark Canyon - Utah
Who's Online
0 registered (), 16 Guests and 0 Spiders online.
Key: Admin, Global Mod, Mod
Newest Members
valongi, Atkinson J, Dcarpenter, Woodland, ultralight
12469 Registered Users
Forum Links
Disclaimer
Policies
Site Links
HOME
Backpacking.net
Family Hiking
Lightweight Gear Store
Backpacking Book Store
Lightweight Zone
Hiking Essentials

Outdoor Gear Daily Deals
Outlets, Sales, Bargains

Our long-time Sponsor, BackcountryGear.com - The leading source for ultralite/lightweight outdoor gear:

Backcountry Forum
 
 

Since 1996 - the Original Backcountry Forum
Copyright © The Lightweight Backpacker & BackcountryForum.com