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New winch height record



 
 
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  #21  
Old November 26th 07, 07:42 PM posted to rec.aviation.soaring
Mike Schumann
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Posts: 539
Default New winch height record

You would need to be able to get the gliders from the landing runway to the
launch point.

Mike Schumann

"2cernauta2" wrote in message
...
On Sun, 25 Nov 2007 15:53:27 -0800, "BT" wrote:

how many glider club or commercial operations have 10,000ft of "runway"
available.
granted.. for most 4000ft runways.. it could prove very beneficial

BT


Wouldn't it be possible to locate the winch outside the airfield's
boundary, and launch with a longer rope on a 600m runway?
Is this common practice at some glider sites?


Aldo Cernezzi




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  #22  
Old November 26th 07, 09:48 PM
mart mart is offline
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First recorded activity by AviationBanter: Jan 2007
Posts: 23
Default

Wouldn't it be possible to locate the winch outside the airfield's
boundary, and launch with a longer rope on a 600m runway?
Is this common practice at some glider sites?


We do. Mount Beauty Gliding Club.
You will not believe the hassle it gives though. Everytime closing the gate to prevent cows entering the runway, chasing cattle of the cable before launching and cow**** around the winch. No joke.

Very happy with the extra 1000 ft.
  #23  
Old November 27th 07, 12:38 AM posted to rec.aviation.soaring
Martin Gregorie[_1_]
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Posts: 276
Default New winch height record

Mike Schumann wrote:
Rent a 100' wide swath in the middle of a field.

That might work OK when the wind is directly down the strip, but what
about cross winds, especially with a new-chum driver or a cable break?


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |
  #24  
Old November 27th 07, 01:32 AM posted to rec.aviation.soaring
BT
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Posts: 995
Default New winch height record

it could work to the south.. to launch to the south.. about 1/3 mile to the
power line..
to the north.. can't run the cable across the road
great idea though
BT

"2cernauta2" wrote in message
...
On Sun, 25 Nov 2007 15:53:27 -0800, "BT" wrote:

how many glider club or commercial operations have 10,000ft of "runway"
available.
granted.. for most 4000ft runways.. it could prove very beneficial

BT


Wouldn't it be possible to locate the winch outside the airfield's
boundary, and launch with a longer rope on a 600m runway?
Is this common practice at some glider sites?


Aldo Cernezzi



  #25  
Old November 27th 07, 04:36 AM posted to rec.aviation.soaring
Mike Schumann
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Posts: 539
Default New winch height record

OK, Rent a 200' wide strip and ask the farmer to plant soybeans or alfalfa.

Mike Schumann

"Martin Gregorie" wrote in message
...
Mike Schumann wrote:
Rent a 100' wide swath in the middle of a field.

That might work OK when the wind is directly down the strip, but what
about cross winds, especially with a new-chum driver or a cable break?


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |




--
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  #26  
Old November 27th 07, 06:53 AM posted to rec.aviation.soaring
bumper
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Posts: 322
Default New winch height record

Ultra High Molecular Weight Polyethylene

UHMW is tougher than Teflon and almost as slick. Handy to have around as it
makes a good anti-chafe tape. The tape, not the rope, like most good things
in life, is available from McMaster-Carr on-line (g).

bumper


" wrote in message
...
What is a Mel winch?

What does UHMWPE mean?

Thanks,

Michael

Bill Daniels wrote:
From Europe:

________________________________________________
"On Sun, November 25, 2007 9:31 am, peternarinx wrote:
Yesterday, on the airfield of Weelde ( EBWE) in Belgium, Peter
Mink reached 1718m AGL with an ASK21 and a Mel winch."

"The length of the runway is 3100m including the grass at both ends
and the winch is on the ground. You can see the airfield on google
earth 51 23 48 N , 04 37 77 E. They said that the conditions were
not optimal yesterday......."
_________________________________________________

1718 meters is 5,636 feet AGL. The runway length is 3100 meters or
10,170
feet.

With the new light weight UHMWPE winch rope and a modern high performance
winch, great heights can be achieved.

Bill Daniels



  #27  
Old November 27th 07, 02:39 PM posted to rec.aviation.soaring
Del C
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Posts: 35
Default New winch height record

Our experience of UHMWPE cable was that it 'floats'
much further downwind after a cable break, so is more
likely to go across something!

Del Copeland
Lasham Gliding Society, UK
At 15:30 26 November 2007, Bill Daniels wrote:


I would speculate that Spectra or Dyneema is a lot
more forgiving in this
regard. It's possible that sites unsuitable for steel
cable would be
workable if Spectra or Dyneema is used.

Steel cable is heavy and can damage anything it falls
on. Because it forms
kinks and weak points, is easier to break. It's electrically
conductive so
power lines are an extreme hazard.

Spectra or Dyneema is so light that it 'floats down'
more than falls so is
unlikely to damage anything unless it is pulled across
something under
tension or the connecting hardware does the damage.
It's also a very poor
conductor.

Bill Daniels





  #28  
Old November 27th 07, 10:29 PM posted to rec.aviation.soaring
brtlmj
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Posts: 59
Default New winch height record

On Nov 26, 10:37 am, "Bill Daniels" bildan@comcast-dot-net wrote:

It would be great to have both capabilities.


....and that would probably require two winches. Even though one could
release at 1500ft when being launched by a 4000ft-capable winch, it
would probably be pointless. But then, would it be possible to operate
two winches safely?

Bartek
  #29  
Old November 27th 07, 11:40 PM posted to rec.aviation.soaring
tommytoyz
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Posts: 57
Default New winch height record

Bartek,
Most winches have more than one drum. In Europe, one winch can have up
to 8 separate drums and lines. This enables a launch every 3 minutes
or less.
http://www.hydrostart.nl/EN/
Tom


  #30  
Old November 28th 07, 12:07 AM posted to rec.aviation.soaring
brtlmj
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Posts: 59
Default New winch height record

Most winches have more than one drum. In Europe, one winch can have up
to 8 separate drums and lines. This enables a launch every 3 minutes
or less.http://www.hydrostart.nl/EN/


Oh, sure. But what if a club wanted to have one winch for high
launches, located at the far end of a runway, and another one for
circuit practice, located in the middle of the runway?

Bartek
 




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