# Thread: 30 degrees = thumb and finger..

1. Originally Posted by Trooper
I wish I had this much fun in math class.

Just make sure you hand is unloaded; hammer down on an empty chamber, before aiming it at your hammock.

Happy napping,
desmobob

2. Originally Posted by vgnbkr
My pistol is easily 90 degrees.

I can stretch a peace sign to 45, but if I just make a peace sign without stretching, it's very close to 30.
I'm pretty sure the OP is talking about the angle of the hypotenuse and base of the triangle formed by the thumb and index (where the index is the base and the hypotenuse is the invisible line formed between the tip of the thumb and the tip of the index finger). I haven't measured mine but it looks pretty close to 30 to me.

Edit: BAD ASCII GRAPHIC where T = Thumb, I = Index and h = hypotenuse (no finger)
Angle ~ 30+(?) depending on ratio of thumb to index

Th
T..........h
T.......................h
T....................................h
T................................................h
T 90*..................................~30*?........ .h
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIII

3. Originally Posted by oldgringo
Interesting, but not terribly useful...better to learn what works for you, and what it looks like. That may, or may not, be 30* off of horizontal.
Originally Posted by Hawk-eye
whew ... finally something that doesn't make my head hurt
Man do i agree LOL

i think some ppl read too much into the hole 30 degree angle and how tight there ridgeline is...

hang your hammock...if it feels good...then let it be
it doesn't need to be 30 degrees on the spot
once you start reading too much into 30 degree angles and this and that your start to overthink your setup....

just my .01

4. Originally Posted by timabababaluka
I think that Highbinder and Frawg are saying that if your thumb and forefinger are perpendicular to each other (at a 90), then an imaginary line drawn between the tip of your forefinger and the tip of your thumb should be about 30 degrees. It seems pretty close.

Highbinder/Frawg--please forgive me if I'm putting words in your mouth that are other than what you intended (I've been wrong before (and will without a doubt be again)).
No no that's it exactly

5. Had to break out the trigonometry I learned 14 years ago to calculate this one. Let x = length of you index finger (measured to the joint of your thumb) and y = length of your thumb.

tan(30 deg) = y/x
x * tan(30 deg) = y
x * .57735 = y
or
x = y / .57735

So, if the length of your thumb is 3 inches (as mine is), then your index finger needs to be 5.2 inches long to make the 30 degree angle. Mine is ~5.6" (again, measure to your thumb joint), so my angle is slightly less:

tan-inverse(3/5.6) = ~28.17 degrees

Which I call "close enough".

Nice trick! Now I just have to take a few steps back, hold up my hands to frame my suspension and see if the suspension hits my index finger and thumb tips when the index finger is parallel.

~Dan

6. WOW! Neat trick!! My "Pistol" is about 28 - 29 degrees (kids protractor that I couldn't find till just now) SO, close enough for me! Based on that, my current suspension (from last night) is around 25 degrees, so now I know I need to adjust it just a bit. I'm going to have to remember this.

7. ## Why?

I'm not sure I understand...

Why is 30d the "norm?"

Why is 30 better than say 20 or 40?

I use a fixed ridge line and I like to pull my setup tighter... say 10-20 degrees...

Am I putting too much stress on the rig?

Thanks!

8. 30* puts the least amount of stress on the set up, but many people opt to go tighter. The following thread discusses this quite in depth, and includes a nifty chart explaining how angles affect stress.

http://www.hammockforums.net/forum/s...ht=angle+chart

Hope this helps!

9. Ah! That does help.

10. Near perfect right angle (90°), with mine.