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I'm officially freaked out now. :scared:
This is a great method that hadn't occured to me, thanks for sharing!
Also, glad i'm not the only one who noticed Uma Therman's thumbs! It's been freaking me out for years. That and Angelina Jolie's knees.
:scared:
Asked TeeDee about this and he said not to get hung up trying to get the 30 degree sag angle.
But if you want, there is a very easy method for determining when you have a 30 degree sag angle.
Take a look at this image he calls a 30-60-90 triangle (that's the magnitude of the 3 angles, a being the 30 degree angle):
http://www.hammockforums.net/gallery...0/thirty.a.jpg
With a a 30 degree angle, side o is exactly 1/2 of of side h.
So measure and mark a known length on your suspension, say 6". On the upper mark, the mark furtherest from the hammock, tie a string and mark the length that is exactly 1/2 of the first length, say 3". Tie a weight on the end of the string, say a nut.
When you hang your hammock, if the imaginary line joining the two end marks is level, then you have a 30 degree sag. You can eye ball to see if the joining line is level, or you can get more accurate and use a carpenters level.
As he said, don't get too concerned about trying to get exactly 30 degrees, but then if you're laying in the hammock thinking about it, it might be a good way to go to sleep, Probably better than counting sheep.
The 30-60-90 degree triangle is a draftsman's tool, or was, when there were still draftsmen. Once you've used one for a semester ;), the 30 degree angle is intuitive.
While that is a rather precise method it requires more work than I'm will to put into it while out in the piney woods. When I first started hanging last year, I built an inclinometer that worked based on a plumb bob. I took a small piece of 1/4" plywood and used a protractor to mark out a vertex and 10 degree angle increments along the semi circle. I drilled holes at each point. I threaded a loop of string through the vertex point. To use it I attach a small carabiner to the loop and hold the reference edge with the vertex to the suspension and read the angle off the scale. It's simple, low tech, zero cost and weighs next to nothing.
Although in retrospect, I really like oldgringo's thumb and index finger method.
Cheers
Brian