it was Capt Mooron who said that
| cranes never had their booms & rams set up in similar geometry to solid
| vangs, and was Scotty who proved they do in fact.
Capt. Mooron wrote:
**** You Doug....
A little touchy, are we?
... where did he prove that?
:Scott Vernon
:alt.sailing.asa
:8/28/2004 11:10 AM
"Capt. Mooron" wrote
Quit toying with the damn boom.... look think of it this way... how
many
lifting devices utilize a support located under the boom at less
than 25% of
the boom length? NONE!
Wrong, kanook.
Have you never seen an engine crane?
A bascule type draw bridge?
Any hydraulic crane with the boom out?
An excavator?
need more?
Scotty
I always said the topping lift was better situated to lift a load.
And that's wrong. It's not a case for *always*. Did you ever realize
that the tension on the topping lift was greater than the weight, and
the forces on the mast were also multiples of the weight load?
I don't think you tried to understand what I was trying to explain. I am
not a particularly good explainer, but your mind seems to be made up
regardless of the above facts.
DSK
|