What's new
What's new

0t--Russian riggers

A few log chains and another tank'r two and #3 is flipped back upright aggin.

May have oil burning off the manifolds for a day'r two tho...


---------------------

Think Snow Eh!
Ox
 
It's an interesting and instructive video in that it's not entirely obvious that, until it happens, that the wooden support is going to get kicked backwards leaving the bridge hanging. Here, the high school model of friction (force of friction = coefficient of friction X normal force) holds between the wood and the floor, because both are hard and don't distort. Meanwhile, the bridge feet are clearly dug into the wood so there, the friction formula doesn't apply any more. It's wild to see the wood slip that easily on the floor even though the normal force is so high, because the horizontal force component the bridge is applying to the wood is higher! This by the way, is the sort of thing that professional riggers can just see, without all the math, which is why it's so cool when you get to hire them to move something heavy and expensive without dropping it. See my thread "New Machine Day Hole in the Hospital Edition" from a few years ago for my last fun experience with this.
 








 
Back
Top