Gliding: how was it for you?

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Fox3WheresMyBanana
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Re: Gliding: how was it for you?

#21 Post by Fox3WheresMyBanana » Fri Aug 31, 2018 8:57 pm

With any swept wing aeroplane, above a certain angle of attack, you may be able to change where you are pointing with the stick, but it doesn't change where you are going. You need power for that, and a lot of it.

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Re: Gliding: how was it for you?

#22 Post by FD2 » Tue Sep 04, 2018 7:53 pm

Gliding to 76,000 ft

A new flight altitude record has been set - by a glider.

Pilots took the carbon-fibre sailplane named Perlan 2 to 76,124 feet - 23,202 metres - above Patagonia in Argentina, project backer Airbus said, smashing two of its own previous records.

Pilots Jim Payne and Tim Gardner flew higher than even the US Air Force's U2 spy plane aircraft, which topped out at 73,737 feet in 1989, the aircraft manufacturer said.

In erasing its own two records, the pressurised glider crossed the "Armstrong limit," the threshold between 59,000 and 62,000 feet above sea level, where blood boils without insulation.

Aiming to break the 42-year-old altitude record of 85,000 feet set by the SR-71 Blackbird jet, Perlan 2 exploited massive seasonal wind currents ripping in from the Pacific.

During the late South American winter, those waves roll east across the Andean cordillera and, after sweeping the mountains, merge with cyclonic high-altitude winds from Antarctica.

With an assist from that polar vortex, the combined energy creates a supercharged thrust capable of surging more than 100,000 feet - 30,480m - into the stratosphere.

https://www.stuff.co.nz/travel/news/106 ... rd-heights

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1536001786770.jpg (19.06 KiB) Viewed 252 times
A small advance from T31 days eh?!

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Re: Gliding: how was it for you?

#23 Post by Wilco » Sat Sep 08, 2018 4:05 am

FD2
Thanks for the link. Good stuff!

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Re: Gliding: how was it for you?

#24 Post by Boac » Sat Sep 08, 2018 7:44 am

Late picking upon this thread, but a couple of inputs:

F3 - I believe JF did an 'engine out' in a Harrier on a test flight - I cannot lay my hands on the details right now

For all - how did the pilots of the Perlan maintain pressurisation?

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Re: Gliding: how was it for you?

#25 Post by FD2 » Sat Sep 08, 2018 11:03 am

Boac - from the article:

'In erasing its own two records, the pressurised glider crossed the "Armstrong limit," the threshold between 59,000 and 62,000 feet above sea level, where blood boils without insulation.' Ignore the boiling blood...


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Re: Gliding: how was it for you?

#27 Post by Boac » Sun Sep 09, 2018 7:18 am

Still unable to fnd a link to the 'tech' providing the presurisation. It is, unbelievably, at an 8.5 psi differential, and the two-person crew will not wear pressure suits. All I have found is that the cabin 'is designed to be leak free' but can cope with a loss rate of '1litre per minute' - I think all done from installed compressed gas.

Absolutely staggering to see that it has exceeded the altitude record for wing-born powered aircraft.

Going back to Fox3 post #15 - the 'One-in-one' was a practised Hunter manoeuvre and if memory serves me right 'qualified' controllers would guide the aircraft to a point where 1000ft per mile would reach the runway at which point you blew down the flaps and gear. I remember a trip at Chivenor where we did it for practice with a cloudbase of about 1000ft. Amazingly reliable.


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