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Perlan Climbing



 
 
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  #31  
Old September 3rd 18, 01:50 PM posted to rec.aviation.soaring
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Default Perlan Climbing

Amazing and Congratulations reaching 76,000 feet

AE

  #32  
Old September 3rd 18, 11:33 PM posted to rec.aviation.soaring
Tom[_21_]
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Default Perlan Climbing

Absolutely cool! Good for you guys.

Keep it going.

Regards Tom
  #33  
Old September 12th 18, 02:06 PM posted to rec.aviation.soaring
Dave Nadler
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Default Perlan Climbing

Towing down the runway now:
http://www.perlanproject.cloud/VirtualCockpit.html
  #34  
Old September 12th 18, 03:08 PM posted to rec.aviation.soaring
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Default Perlan Climbing

On Wednesday, September 12, 2018 at 9:06:58 AM UTC-4, Dave Nadler wrote:
Towing down the runway now:
http://www.perlanproject.cloud/VirtualCockpit.html


It is reported by the ground crew that today is a "Ripping" day....
  #35  
Old September 12th 18, 04:42 PM posted to rec.aviation.soaring
Dan Marotta
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Default Perlan Climbing

It appears to be coming down.

On 9/12/2018 8:08 AM, wrote:
On Wednesday, September 12, 2018 at 9:06:58 AM UTC-4, Dave Nadler wrote:
Towing down the runway now:
http://www.perlanproject.cloud/VirtualCockpit.html
It is reported by the ground crew that today is a "Ripping" day....


--
Dan, 5J
  #36  
Old September 12th 18, 04:54 PM posted to rec.aviation.soaring
Steve Leonard[_2_]
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Default Perlan Climbing

Now, that is a rare problem!

"The lift was too strong to do the 50,000 ft flutter excitation test, so they excited the lift temporarily."

The lift was too strong at 50,000 feet, so they had to move to a different location so they would not exceed their planned speed at that altitude. I think that would qualify as a "Ripping" day, alright!

Steve Leonard
  #37  
Old September 12th 18, 10:56 PM posted to rec.aviation.soaring
Bruce Hoult
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Default Perlan Climbing

On Wednesday, September 12, 2018 at 8:54:47 AM UTC-7, Steve Leonard wrote:
Now, that is a rare problem!

"The lift was too strong to do the 50,000 ft flutter excitation test, so they excited the lift temporarily."

The lift was too strong at 50,000 feet, so they had to move to a different location so they would not exceed their planned speed at that altitude. I think that would qualify as a "Ripping" day, alright!


So no attempt at a new record, and I believe they are now packing up to go home for the year.

I wonder how the envelope expansion went. The glider design is intended to provide a usable speed range between stall and flutter at 90k ft, but the upper limit they've been sticking within this year runs out soon after 75k ft.

It possible they have have found they need some remediation before going higher.
 




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