black cat 2 tarp

**blackbishop351** · 02-13-2007, 23:53

Originally Posted by hammock engineer

We could. I would attach my own work, but all my math is hidden in 10,000 or so lines of MATLAB and VB code. My thesis reads closer to a tech. paper than a math book.

VB?!?!

Blasphemy!! **YECH!!!**

Jeff, don't ask me how this relates to hammocks...my imagination does have limits, being a scientist and all

And thread drift concluded anyway!

**Coffee** · 02-13-2007, 23:56

Originally Posted by blackbishop351

VB?!?!

Blasphemy!! **YECH!!!**

Jeff, don't ask me how this relates to hammocks...my imagination does have limits, being a scientist and all

And thread drift concluded anyway!

Easy, I could be hanging in my room in my hammock. I'm not there right now, but I could be in a minute.

That really doesn't pretain to it, I just wanted to rub it in.

**Just Jeff** · 02-13-2007, 23:59

Ok ok...making fun of each other is great and all, but he started this thread to show us his new tarp. Back to HIS tarp. Where are the pics?!

**blackbishop351** · 02-14-2007, 00:02

Originally Posted by Just Jeff

Ok ok...making fun of each other is great and all, but he started this thread to show us his new tarp. Back to HIS tarp. Where are the pics?!

You're right, and I'm thrilled that more and more people are making these. And especially thrilled that I've been able to help to some degree or another. We definitely need pix though!

**The Breeze** · 02-14-2007, 00:22

just put it up strait as an arrow. tight everywhere but to dark for a picture or you know me im in to pics at night, but its black and you can't see it . it raining and foggy and 34 degrees out well you get it . its just to dark and its black .

pictures tomorrow

**Coffee** · 02-14-2007, 00:55

Cool glade it worked out. I think there is a lot of fudge to these projects. I just can't bring myself to do it intensionally, my sewing does it for me.

**stoikurt** · 02-14-2007, 14:00

Did you put binding on the edge or go without?

**The Breeze** · 02-14-2007, 16:34

put edging bios tape around the edge and gross grain tieouts here are the pic.wind was blowing 25 mph when these was took

**seuss** · 02-14-2007, 16:59

Originally Posted by blackbishop351

Just for general information purposes, I got a bug and checked my cat generator against the Excel file Youngblood posted on the Yahoo HammockCamping group. The test edge length and cut-depth were the ones I use - 74 1/2" edge, 1"/ft. cut-in. There was less than 1/16" max difference between my measurement results and his. This error will of course get larger as the edge gets longer.

Anyway, conclusive results - at least for a ~ 6' edge, his spreadsheet works just fine for calculating cat curves. I still prefer my data output method, though

I also like the peace of mind that comes with knowing nothing's been "fudged"...but that's just the math geek in me.

I also worked up an excel catenary generator a couple years ago - not nearly as easy on the eyes or in use as youngblood's, but uses the same math. I posted it here

---->catenary generator

At the time I tested it by hanging 8 different lengths of chain on my hallway wall and comparing the measured sag against that predicted by the spreadsheet. The predicted and measured curves were very close. You can see the data in the third worksheet "Observed Profiles."

And to get back on topic. . . . nice tarp.