Winching - Cable danger.

Our club is using cheap ordinary polyprop rope ,there is no tendency at all
to
spring at the winch even with releases under tension.
The rope contracts into its own length.
gary
"Shawn Curry" wrote in message
news:9zE7c.58429$JL2.758827@attbi_s03...
JS wrote:

Bill, excellent point!

I have always considered the winch drivers job to be more dangerous than

the

glider pilots. I tell people that each time I reach for the throttle, I
think about the 300 pounds of steel wire that is about to come straight
at
me doing 70 MPH.

Steel wire mesh or screen is totally inadequate to protect the driver.

The

winch cab windows should be 3/4" polycarbonate (Lexan) which, I'm told,

will

stop a 9mm bullet fired point blank. Yes, Lexan will get scratched
eventually but it's not that expensive to replace. The rest of the cab
should be at least .125 inch steel sheet.

Spectra will reduce the danger somewhat but the rest of the hardware
will
still be there and present the same dangers.

I would prefer a winch cab that is armored, weather tight and air
conditioned.

Bill Daniels



What about chanching the rotation direction of the cable reels, would it
make the lose cable end hitting the ground instead of drivers cabin?

js



Would Spectra or some other synthetic cable improve this? How much does
it stretch? My thought being that, there would still be a lot of energy
in a stretched light weight cable (imagine a 1000 foot rubber band
pointing at the driver) despite the lower weight and mass-to-drag while
falling.
Also, is the problem with steel wire/cable the elastic energy stored
from the launch, the mass of the falling steel, or a combination, that
creates the danger?

Shawn