STUCK WEIGHT CALCULATORS

[badnuz]

Hey All

does anyone have a link to a calculation for the stuck weight of a 4x4?

ie Nissan stuck to hubs 1.5 x times weight, stuck to top of tires: leave it lol!!

cheers!

[playingInTheDitch]

found this on a U.S. forum:

Worked recovery for 15 years in the military. We had a thing we called mire factor that we looked at eveytime we went to get seomthing UNstuck.

up to the axle, Mire factor 1
Up to to top of tire, Mire factor 2
Up to top of fender, Mire factor 3

For snatch pulling, everything I read and found, multiply by 5.

Your 5000 lb 4Runner would need a 25,000lb rated snatch rope.

figure out the GROSS weight of your vehicle, this includes all the stuff you carry as well as yourself. Multiply it by the mire factor and go with the recovery gear that is

rated for that load X1.5.

Say you are up to the top of your tires. Your got 1000 pounds of gear in your 5000 lb truck. Gives you a 6000 lb gross load. Your winch is rated for 7500 lbs.

Your actual load is 12,000 pounds because you are over your tires, but under the fender. You run one snatch block 2:1 giving you a 13,800 lb pull. Your recovery ropes and anchor

straps would have to be rated for 20,700 lb loads.

If you are running a winch, add 10% of the load for each pulley you go through.

Winch rating was determined by GVW X1.5 or if the 4Runner is 5,000 lbs, a minimum 7,500 lbs rated winch is needed. Now you COULD get by with this and 2 pulleys and rig a 3:1

system and get 20,500 lbs of pulling power (remember the 10% loss for each pulley or 1,500 lbs). Safe straps in that instance would have to handle a 31,000 lb load. Again,

safety rated at 1 1/2 times the load.

It may seem like overkill, but when you are pulling a 68 TON track with a 90 TON winch rigged for a 180 ton pull, you pay attention when a 2" cable breaks with 200 feet

stretched out tight.

The other big thing is to keep this stuff CLEAN. Dirt will cut it just like a knife will. If it is frayed at all, destroy it and get new stuff. Even if you have only used it

once.

Remember, this stuff will come at you with enough force to kill you or destroy your vehicle.

With that in mind, bring OLD blankets or coats and throw over your recovery set up when your are working it. WHEN something breaks, it will act as a shock absorber and slow

things down on you. Always hook your hooks open side UP so WHEN they break, they will be force DOWN into the ground, not flying into the air.

hope it helps

[monterey]

I found these a while back, I think they are from a British armed forces training manual.





Hopefully I've uploaded these right!
Ken.

[redz driver]

Cheers Guys
Im completing a paper on recovery and the mire index changes between differant armys

[Jerry]

so if it takes 4 toyotas and a daihatsu to strop a well bogged nissan out what is the mired factor how much do you have to adjust if one of the bullbars err falls off

[coxsy]

well don't recover off bullbars its become clear isn't it
also recovery isn't a time challenge

[redz driver]

You guys know that nissan stands for (nissan is stuck send another nissan)
Thats why I drive a cruiser

[De-Ranged]

well don't recover off bullbars its become clear isn't it
also recovery isn't a time challenge

There is another way to look at this if the job is to big for the gear available break it down into manageable bits

Here is a good example
Jeep (3500 lb)
Bogged to top of wheels (x2 mire factor)
Safety factor (x1.5)
for a total of 10500 lbs

Gear available chain and snatch strap, and lots of redneck advice .... all of unknown value


Safe option
vehicle body (1000 lb)
not bogged (0 multiplier)
disabled (x 1.66)
safety (they did step back , x1.5)
for a total of 2490 lb well below the rateing on the cheapest crap sold at repco

Results


Priceless

[CLUMZ1]

What a waste

[Big]

thats priceless..Hate to say it but yanks..lol

[muddyhilux]

go the tards is all i can say

[kbushnz]

Wow what a waste... But at least it was a jeep....
Here is a good link with recovery info....
And also quotes those pages as previously posted....
http://www.pirate4x4.com/tech/billavist ... index.html

[TJ]

Wow what a waste... But at least it was a jeep....
Here is a good link with recovery info....
And also quotes those pages as previously posted....
http://www.pirate4x4.com/tech/billavist ... index.html

It was a Jeep with square lights..... So it was worth killing it...

It just goes to show shearing point of body mount bolts (there would be 11 total, possibly not grade .