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Westland Lynx projects

hesham

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Hi,

Lynx HT.3:proposed training version for the Royal Air Force, not built.


Lynx ACH:proposed Advanced Compound Helicopter technology demonstrator, partly funded by the Ministry of Defence. Announced in May 1998, the ACH was planned to be powered by RTM322 engines with variable area exhaust nozzles and a gearbox from the Westland 30-200, have wings attached at cabin roof level and BERP rotor blades. It was predicted to fly approximately 50% faster than a standard Lynx.


AgustaWestland AW159 Lynx Wildcat:a development of the Super Lynx with two LHTEC CTS800 engines; previously known as the Future Lynx.


Westland-606:14-seat civil version of Lynx.


http://en.wikipedia.org/wiki/Westland_Lynx
http://en.wikipedia.org/wiki/AgustaWestland_AW159
http://www.flightglobal.com/pdfarchive/view/1973/1973%20-%202372.html
http://www.flightglobal.com/pdfarchive/view/1982/1982%20-%200986.html
 

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harrier

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Also Lynx 3, with uprated Gems, WG.30 (your 'Lynx 2' pic above is WG.30) tailboom/rotor, BERP blades and cabin stretch, IIRC. One flown 1984. See

http://helicoptermuseum.co.uk/westland.htm

http://www.airliners.net/search/photo.search?regsearch=ZE477

Any pictures of the Lynx ACH?
 

frank

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There are a number of gunships here:
http://www.secretprojects.co.uk/forum/index.php/topic,2212.0/highlight,lynx+gunship.html
 

Hood

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Airlife's Helicopters and Rotorcraft lists the Westland 606 as having a P&W PT6-34 turboshaft option too.
 

Triton

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Artist's impression of GKN Westland Lynx advanced compound helicopter (ACH) technology demonstrator from 1998.

The aircraft would have been equipped with wings and a modified Rolls-Royce Turboméca RTM322 engines to demonstrate lift and thrust compounding.

Target requirements for the ACH included speeds of around 250kt (460km/h), operating altitudes of over 20,000ft (6,100m), lift-to-drag improvements of 25-50%, propulsive efficiency increases of up to 50%, payload/range improvements of 20% and life-cycle cost reductions of 10-20%. The demonstrator was expected to be about 50% faster than a standard Lynx.

The helicopter would be fitted with wings equipped with trailing-edge flaps to vary lift compounding. A moving tailplane would trim the pitching moment created by the flaps and a trimming rudder would offload the tail rotor at high speed. The main rotor would use Westland's BERP blade, which complements the compound concept by retaining its efficiency to higher speeds

To provide the higher power required, the demonstrator would have its R-R Gem engines replaced with two RTM322 turboshafts driving an uprated gearbox developed for the defunct Westland 30-200 helicopter. Excess power would be converted to jet thrust by variable-area nozzles. Adjusting throttle setting and nozzle area would provide a range of thrust and shaft power combinations to vary thrust compounding.

Source:
http://www.flightglobal.com/news/articles/westland-prepares-compound-helicopter-demonstrator-37545/
 

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hesham

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Hi,


here is a NASA research about Westland Lynx helicopter,on a model with a
curved rotors,from Luftfahrt 12/1980.
 

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TsrJoe

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The curved rotor proposal is different, do you know of any further information on the study?

Cheers, Joe
 

TsrJoe

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many thanks, i'l give one of my German students a little tasking ;)
 

overscan

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So, not easy to read at that size.

I've got the article in front of me. I don't read German but it's pretty clear it's a article based on a NASA patent for acoustically swept rotors:

https://www.google.co.nz/patents/US4168939

It even says so.

There is nothing to suggest the Lynx model was anything more than a modified off the shelf plastic kit to illustrate the concept. No evidence it's a Westland project.
 

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overscan

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Added higher res scans to Hesham's post, for people with lesser eyesight like myself :)
 

hesham

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My dear Paul,

I divide each one into two pieces.
 

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overscan

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And what did that achieve? I already added higher resolution scans to your post.
 

Jemiba

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The aim of that rotor shape was to reduce the "blade slap noise", to be achieved by
using crescent shaped rotor blades.
And yes, as the text suggests, the model of the Lynx was just chosen by either the author of
that article or the editors "to give an idea, what such a rotor would look like" .
 

JohnR

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Why would NASA choose a foreign Helo for the test, the US must have the widest choice of helicopters from domestic production?
 

hesham

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JohnR said:
Why would NASA choose a foreign Helo for the test, the US must have the widest choice of helicopters from domestic production?
Good question,but NASA did it many times before.
 

overscan

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The NASA report has no mention of specific types. The Lynx is a model made for the magazine, nothing more.
 

JFC Fuller

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Related to the Westland Lynx ACH demonstrator, I found this patent from December 1992. Interestingly this appears to have a pusher propeller: http://www.google.co.in/patents/US5174523

Apparently Westland also looked at a compound version of the Merlin.
 

RavenOne

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hesham said:
JohnR said:
Why would NASA choose a foreign Helo for the test, the US must have the widest choice of helicopters from domestic production?
Good question,but NASA did it many times before.
https://rotorcraft.arc.nasa.gov/Research/Programs/lynx.html
 

mrmalaya

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As to contemporary Westland compounds, I would say the Merlin proposal looks better but doesn't appear to have the thrust addition talked about for the Lynx.
 

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Ron5

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The Merlin guys were after greater altitude & endurance, not speed. I seem to remember that a Hurricane wing was the model. That sounds so daft, I must be wrong.
 

hesham

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From L+K 12/1976,


Lynx with special inflatable floats
during the emergency landing test
water surface
 

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