k8icu wrote:Chunk, twice you've said it wont work, but you haven't posted as to why you believe it wont work. How about telling us why instead of it just wont.
Personnally I think if it was printed in the manual or a PS mag then the army tested it and knows it does work. So yeah I think it will work.
Bill L pretty much lays it out. Its going to pull on both the front and back. I don't see how it could only pull on the back of the truck.
OK Lets say that there is twice the pull force on the rear as on the front and figure its all on the same line. you would be pulled to the rear.
Keep in mind that it is not two seperate lines, it's one line pulling twice as hard from the rear. I think it will work ( on your truck not mine!).
J.B.
OK, lets put a little math to it. Here are the starting assumptions (numbers used are for easy math):
20' - Truck Length
20' - Distance to front snatch block
20' - Distance to rear snatch block
40' - Distance from center of truck to side snatch block
In this condition there is 180' of winch line deployed
20' - Front
100' - Side
60' - Rear
Now lets look at the amount of winch line deployed if the truck is fully againt the rear snatch block
40' - Front
100' - Side
0' - Rear
140' - Total!
So for every foot of rearward movement, it takes 2' of winch length.
Yes exactly
when using double tackle for every foot going backwards ( or any direction) you use 2' of cable so basicly one foot goes into the winch(ing) and the other foot matches the backward movement.
Not as well put as W.A. stated but I think you'll get the point
Chunk, you need to think of it as a moving winch operation... just because the winch only winds one way dosen't mean that the direction of the "final pull" has to corrospond to a the usual single line or block practice. The pulleys can change that. It's definately "outside of the box" but true.
Like I said, do you think the Army would have published a procedure in a manual just to have soldiers waisting time or to damage the truck? With out the math and all that if you just think about it it has to work or they wouldn't have put it in for the dippy private to mess with! Too much time and money invested in both truck, man and mission to be mucking around.
It's basic high school physics. We learned about pulley systems clear back in 6th grade science class, actually. I think the problem is that (a) mechanical systems have taken a back seat to electronic systems in science education these days a d (b) far fewer kids are signing up for chemistry and physics these days. They don't know squat about science, but they sure can build a web site!
Murf
You did say it and I understood it but there are still folks here who don't understand it...yet, so I guess we're just trying to re-explain it in different format. It took me a couple of days after seeing it to finally understand how it works...Hell I almost had a aneurysm
Murf
You did say it and I understood it but there are still folks here who don't understand it...yet, so I guess we're just trying to re-explain it in different format. It took me a couple of days after seeing it to finally understand how it works...Hell I almost had a aneurysm
Oh I know, my statement was for them, I was being a wise-guy
the mechanical advantage of the reduction in the back would out-pull the single line in the front. I would think it would be very hard on the truck though.
Home
I thought I just said that...
This is like ribics cube! 
