From: muratlanne@gmail.com
"Richard Smith" wrote in message news:m1msd69agn.fsf@void.com...
"Jim Wilkins" writes:
> More than one turn of rope on the drum will walk sideways.
> ...
I didn't know that.
That's why capstans/windlasses have a concave "waisted" shape - so the
rope stays central, being unable to "climb" the taper? ...
Rich S
----------------------
I built functional sailing ship models as a kid, the largest one a square
rigger with a capstan for the anchor.
As well as I can remember from around 1960 my wooden pulleys had rounded
grooves cut by my father's smallest lathe gouge. I think I used the parting
chisel for depth and then rounded and widened them. The windmill multi loop
string (butchers' twine?) drive lasted a month or two outdoors, until the
wood-on-nail bearings rusted and wore out and needed rebuilding. The noise
of tumbling rocks may have deterred birds from the vegetable garden.
That ship model had ballast consisting of iron filings cemented together by
rusting it with ammonia. It's one recipe for "Beaumont's Egg" which is a
filler to conceal defects in iron castings and a simple-to-make gasket for
poorly aligned low pressure steam flange joints. Urine is said to work if
you don't have ammonia. Leakage may have been one of the reasons for
opposing high steam pressure.
The copper foil hull sheathing was a reject from the 1955 transatlantic
submarine cable. Quite a bit of the central PE-clad wire, copper foil
shielding and steel armor wire didn't pass inspection or impedance testing,
more than they could sell as scrap, and Dad brought some home for my
projects.
https://en.wikipedia.org/wiki/TAT-1
The cable winders were large metal lathes with spools of wire on the
faceplates that fed onto the cable passing through the spindle bore. That
was my first sight of a metal lathe and I knew some day I'd own one. The
Shopsmith was capable wood lathe but wooden machinery is very limiting.
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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