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Cheaper tows?



 
 
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  #41  
Old October 20th 18, 11:05 PM posted to rec.aviation.soaring
Martin Gregorie[_6_]
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Posts: 143
Default Cheaper tows?

On Sat, 20 Oct 2018 14:27:00 -0700, AS wrote:

Towing behind a turbine would be like a cat shot.

Maybe...

Probably the same angle, but LOTS faster than a winch!

Doubtful... One can easily climb at 3-4,000fpm in a winch launch. Can
that tug do that even w/o a glider attached to it?

Uli 'AS'


Here's the fastest and highest winch launch I've ever seen: 4500 ft on a
standard Tost winch using Dyneema rope.

While you're watching the dials go round, remember that this is a metric
glider, so the altimeter is in metres (inner markings are 1000m) and the
vario is m/sec (initial stabilised climb rate is 15 m/s or 30 kts).

http://www.youtube.com/watch?v=-VlRd9-wxQI



--
Martin | martin at
Gregorie | gregorie dot org
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  #42  
Old October 20th 18, 11:28 PM posted to rec.aviation.soaring
Bruce Hoult
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Posts: 913
Default Cheaper tows?

On Saturday, October 20, 2018 at 2:27:01 PM UTC-7, AS wrote:
Towing behind a turbine would be like a cat shot.

Maybe...

Probably the same angle, but LOTS faster than a winch!

Doubtful... One can easily climb at 3-4,000fpm in a winch launch. Can that tug do that even w/o a glider attached to it?


In the latest version in skydiving configuration, that NZ ag plane takes 17 jumpers to 12000 ft in 10 minutes, throws them out, and gets back on the ground in 15 minutes, all up.

I imagine it would do 3000 FPM empty. And what do 17 parachutists weigh, with gear? Probably 1500 kg 3300 lb I guess. It wouldn't notice a single set glider much.

http://diverdriver.com/pac-750xl/
  #43  
Old October 21st 18, 01:32 AM posted to rec.aviation.soaring
Charlie M. (UH & 002 owner/pilot)
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Posts: 1,026
Default Cheaper tows?

Pretty cool writeup on the plane. Thanks for posting.
  #44  
Old October 21st 18, 04:32 PM posted to rec.aviation.soaring
AS
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Posts: 321
Default Cheaper tows?

On Saturday, October 20, 2018 at 6:28:17 PM UTC-4, Bruce Hoult wrote:
On Saturday, October 20, 2018 at 2:27:01 PM UTC-7, AS wrote:
Towing behind a turbine would be like a cat shot.

Maybe...

Probably the same angle, but LOTS faster than a winch!

Doubtful... One can easily climb at 3-4,000fpm in a winch launch. Can that tug do that even w/o a glider attached to it?


In the latest version in skydiving configuration, that NZ ag plane takes 17 jumpers to 12000 ft in 10 minutes, throws them out, and gets back on the ground in 15 minutes, all up.

I imagine it would do 3000 FPM empty. And what do 17 parachutists weigh, with gear? Probably 1500 kg 3300 lb I guess. It wouldn't notice a single set glider much.

http://diverdriver.com/pac-750xl/



Thanks for posting that link - impressive, indeed!

Uli
'AS'
 




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