Posted on 12/24/2004 4:43:14 PM PST by Straight Vermonter
A bigger crane?
Hmmmmm those cars in the back ground keep changing.
The last two photos are suspect at best...
http://www.snopes.com/photos/accident/crane.asp
I hate to ask if the Irish guy in the white vehicle had been drinking.
Denny Crane
If you look at the people in #4 and then compare them to themselves in #9, it becomes obvious this was Photoshopped.
Don''t feel bad, I posted it about a week ago and someone found it in my copy then
Merry Christmas...... and stay warm ;-}
BTTT
Yeah but the red car is gone then reappears in the last photo. Look closer.
Also a good example of benefits of being able to do some quick math/physics on the back of an envelope.
The tree branches are not present, then they are present . . . .?
sorry. faked. these were on instapundit yesterday.
Oh well. I got a laugh out of it anyway.
Notice the incongruity in the background. Observe the red car and white dingy by the red boat when the first crane is working in frames 1-4. Then notice they are gone in frames 5-8 and the red car is replaced with a black van when the second crane is working, but the red car and white dingy return in the final frame 9 when the second crane hits the drink. Who put this together? Dan Rather?
You'll notice the first truck in the water has a tilt-bed body-- what we call a "rollback wrecker" here, so it is not merely a knuckleboom crane-- it's a type of wrecker.
This type of crane does not have a counterweight, so its lift is limited by the weight of the truck it's attached to, to distance the steadying legs ( outriggers ) and the lever-arm of the extended boom. Obviously, the farther you extend the arm, the less it can lift safely without tipping.
It's strictly a numbers game- you have to know the weight of your truck and make an accurate guesstimate ( not hard to do with experience ) of the load's weight. The fulcrum is the point where the outrigger contacts the ground.
The first truck, if it had outriggers, did not seem to use them, and is cattywhompus to the load. That waterlogged little car was heavier than they thought.
The second truck probably should have tried winching the first truck so it was parallel to the wall, rather than perpendicular, minimizing the need to extend the boom.
But an even bigger crane would have been better to start with.
Just an observation.
Merry Christmas
TPD
I dont know if the sequence of pictures has been modified or not .
But yes, wed always try to lift fore/aft rather than over the side even with outriggers
though in our case the outriggers made it pretty stable side-to-side. Lifting over the back was considered better, even then.
Mark
lol
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