johnk
Elite Member
- Joined
- Jun 7, 2003
- Messages
- 2,649
- Location
- western NY
- Tractor
- Kubota GST Grand L3130 w/ 723 loader, Ags
Does it make a difference what grade the chain is i relation to the backlash??
I had no idea that chains would travel such a distance when broken. I'll always stay out of the way of travel. I've numerous chains break pulling logs and such and they always fell pretty much straight down. I've seen chain that was connected to something that stored the energy like a piece of cable or some other elastic product, when the chain broke, it would be flung stuff down the line of travel.A farmer working my grandfathers land in the late 1980's pulled a tractor out with a chain. The chain snapped and the largest section went towards the pulling tractor. Part of it went through the rear window, down the side of the drivers head, cutting him and out the front window. After that if they used a chain they would use 2 chains with a old tire between the 2 and heavy tarps over the chain.
Of course I think they also stayed out of "wet holes" after that too. The tractor stuck had duals pulling a large disk.
Any one ever measured the shadow cast by a tree and then measure a known items height vs shadow length to calculate the exact height of a tree, building etc. Example if you measure a trees shadow at 50 feet and measure say a 8 foot poles shadow at 10 feet then the actual height of the tree would be 80% of the shadow length or 40 feet. This keeps you from using too short of a pulling appratus and dont need a transit and calculator to figure angles etc to find the height.
A less accurate but still effective way is to take a sighting on the tree from about 50 to 100 feet away. Sight in a known distance of say 10 feet, then using a tape or even a stick cut to that sight length, just sight all the way up the tree jumping the bottom of the stick to the top location and overlapping a bit each time. This gives you a rough estimate of the height.
I had no idea that chains would travel such a distance when broken. I'll always stay out of the way of travel. I've numerous chains break pulling logs and such and they always fell pretty much straight down. I've seen chain that was connected to something that stored the energy like a piece of cable or some other elastic product, when the chain broke, it would be flung stuff down the line of travel.
Here are 2 videos that show what a chain can do. The 1st is on an oil rig, the 2nd is a tractor stuck the chain just travels sideways but still enough to hurt.