Thread: grand trunk funky forest tarp.

1. Dejoha, I can't quite see in the pics which tie-outs you are using for the ridgeline. By using those other tie-outs, don't you go from a really long ridgeline (14-15 ft.) to really short (8-9 ft.)?

These are the measurements I came up with when playing with it last year.

2. yes im baffled as well. as i have a 10' + hammock. would love this video. titled "tarp origami!" lol

3. I took a look at my hammock (BIAS Weight Weenie Micro), which is 11 ft. If we assume the hammock ridgeline is going to be 83% of the hammock length, then I should have a ridgeline of 109.5 inches. I also have to factor in the continuous loops run through the channels, 'cause I don't want them exposed to the weather. They add about 4.5 inches to each end. So my total hammock ridgeline length is 118.5 inches, which means I need about 10 ft to cover my tarp.

In my drawing, that means the only configurations I could use to give me adequate coverage would be the 11.5 ft or the 14 ft. option. Using any other tie-outs would be too short, either 8 or 9 ft.

I took the tarp out in the yard to reaffirm my measurements, and they are correct. Dejoha's blog lists the ridgeline as 15 ft., but I don't believe that is correct. The Pythagorean theorem tells me that the diagonal of a 10x10 square is 14.1, unless Grand Trunk has redesigned the Funky Forest since I bought mine last year. The website doesn't indicate any change in design.

So in conclusion, I think there are only two configurations that you can use for an 11 ft. hammock, or in your case, a 10.5 ft. hammock: we're stuck with the 14 ft. ridgeline tie-outs, or the 11.5 (but that one is kind of useless, in my opinion).

Now, if it were a shorter hammock like the ENO Pro (86 inches) or DoubleNest (101 in.), then other configurations would provide coverage, assuming they are using ridgelines that are 83% of the hammock length. If you want an additional six inches of coverage on each end, then your maximum hammock ridgeline for the 8 ft. tie-outs would be 7 ft., or 8ft. maximum hammock ridgeline if you are using the 9 ft. tie-outs.

So you either need a shorter hammock to use dejoha's suggested winter configuration, or you might want to think about Grizz Beaks. They work like a charm!

4. Originally Posted by soulsurvivor
yes im baffled as well. as i have a 10' + hammock. would love this video. titled "tarp origami!" lol
SoulSurvivor:

I was even gonna make you a video till I realized it was mathematically impossible to use dejoha's winter/wind configuration with a 10.5 or 11 ft. hammock. Sorry about that.

Math is not my strong suit so I'm perfectly willing to be proven wrong, but I just can't see it working for longer hammocks.

5. Wow dejoha that is great! I have two of these tarps that I got on a fabulous sale and found them not adequate for winter use and blowing snow....I'm going to have to revisit that after seeing your pictures. I had always wondered about moving it off center, but never took the time to try it out. Just excellent!

6. SilvrSurfr,

I was scratching my head too, because your diagram and description differ dramatically from the tarp I have. I measured my tarp this morning before posting and it is, indeed, 15+ feet on the ridge line and 11 feet on the sides. When I get home, I'll do a more thorough measurement and illustration.

Also, my tarp doesn't have quite the dramatic cat-cut edges. Mine are much more square (not entirely, but much more than what you've drawn). Mine is a brand-new tarp so my guess is that I have a different model.

This is clear in my photos because you can see how easily the tarp folds into itself. Had my tarp had the dramatic cat-cuts on the edges, it wouldn't seal up.

More to come once I get home tonight!

7. Originally Posted by SilvrSurfr
SoulSurvivor:

I was even gonna make you a video till I realized it was mathematically impossible to use dejoha's winter/wind configuration with a 10.5 or 11 ft. hammock. Sorry about that.

Math is not my strong suit so I'm perfectly willing to be proven wrong, but I just can't see it working for longer hammocks.

I should have read the entire thread before posting my "excitement" in regards to the configurations . I see where your coming from, this other configuration won't work for my longer hammock either.

8. For reference, the hammock pictured (in green with the underquilt) is the Woodsman X Single from UK Hammocks. As you can see, the modified tarp pitch adequately covers this hammock. I don't have the numbers in front of my so I can't quote the ridgeline length, so I'll check on that.

I don't remember exactly what hammock I used in the other photo, but I believe it is a DIY 5x10 ft hammock with bug net. A guess on the ridgeline length would be roughly 100 in (roughly 8+ ft).

Those are my rough estimates -- good enough for a political debate, but not entirely accurate. I'll get the facts to you when I get home.

But, all said, I did provide photos, so it really did happen

9. Originally Posted by DivaB
I should have read the entire thread before posting my "excitement" in regards to the configurations . I see where your coming from, this other configuration won't work for my longer hammock either.
I've got a few long hammocks, including the BIAS micro, so I'll see about setting this up for a demo. I'm skeptical, but I'll get some photos to see if it will work.

~derek

10. Originally Posted by dejoha
SilvrSurfr,

I was scratching my head too, because your diagram and description differ dramatically from the tarp I have. I measured my tarp this morning before posting and it is, indeed, 15+ feet on the ridge line and 11 feet on the sides. When I get home, I'll do a more thorough measurement and illustration.

Also, my tarp doesn't have quite the dramatic cat-cut edges. Mine are much more square (not entirely, but much more than what you've drawn). Mine is a brand-new tarp so my guess is that I have a different model.

This is clear in my photos because you can see how easily the tarp folds into itself. Had my tarp had the dramatic cat-cuts on the edges, it wouldn't seal up.

More to come once I get home tonight!
When I checked the website last nite, Grand Trunk had a pull-down menu with Funky Forest tarp, but it's now gone from what I can tell. Now there's an entry for All-Purpose Rainfly; same price, same dimensions, and there's even some leftover copy calling it the Funky Forest Tarp.

However, I do think they've changed the design because yours doesn't have the three exterior loops along the 14' (or 15') diagonal (which I use to hang the tarp under the ridgeline). And if your cat cuts aren't as radical as the ones DivaB and I own, then you probably get more coverage.

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