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Cierva/Weir Prototypes and Projects

hesham

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Hi,

the well known Cierva/Weir W series of helicopters and autogyros,
the W.7 from Flightglobal and Cierva project.
http://www.flightglobal.com/PDFArchive/View/1946/1946%20-%201154.html?search=helicopter%20project%201946
 

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Maveric

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Hi all,

I´m very interested in the british helicopter projects...
...at first by Cierva: there are many projects (C.14/15/16/22/23/31/32/33/35/36/37/38/39).

...and the projects by WeirW.7/8 and 9.

Servus Maveric
 

hesham

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By the way,

the other drawing in the topic may be the Cierva W.8 with a
jet-driven rotor appeared.
 

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hesham

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At first;

who said that,the Cierva W.9 was a project !,it was a two-seat
experimental helicopter actually built for E16/43 Spec.

And the Cierva C.14 was a flying boat Autogyro for the 31/26 Spec.,and the Shorts Brother who was developed it.

C.31 was a project of 1934 for a two-seat coupe autogyro with retractable landing gear and powered by one 385hp
Napier Rapier IV engine.

C.32 was similar to C.31 but powered by one 200 hp De Havilland DH Gipsy Six engine.

C.33 (Avro-665) was an Avro project ,envisaged the combination of a four-seat Commodore biplane with a three-
blade rotor,powered by one 240 hp Armstrong Siddeley Lynx IVC engine.

C.37 was a twin-engined cabin autogyro,proposed by Avro as the Type-668.

C.39 was a project for 2/3 seat fleet spotter autogyro to Spec. 22/38,this would have had a three-blade rotor and
600 hp Rolls-Royce kestrel engine.
 

hesham

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The Cierva C.33 and C.37 projects;

http://homepage.ntlworld.com/david.fildes3/Type%20602%20to%20862
 

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Maveric

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Yes, yes, I´ve found both projects B)
 

hesham

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From l'Aeronautique 1934,


a modified Cierva C.30 with Tampier folded rear landing gear.
 

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Jemiba

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hesham said:
... we can't distinguish between real design and a patent
Actually it's neither ! It's an article about several helicopter types, or better
different rotor layouits.
 

Cy-27

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Strangely enough, I am in the middle of listing brief descriptions of the Weir types for designations section of the forum!

I can recommend The Sycamore Seeds - Early British Helicopter Development by Charles E MacKay (ISBN 978-0-9573443-3-4). It may be a small size book (with small size images) but it traces helicopter development from the Autogyro's to the 1950's helicopters. It also keeps track of contemporary foreign offering from the US and Germany during the 1930's and 1940's.

Attached are some poor scans of the Weir types W.7, W.8 and W9 requested by Maveric. The book is tight bound and I am reluctant to bend the spine too much!

PS The W.9 is also in Wikipedia under the Cierva W9 page .... Weir bought out the name after Juan de la Cierva's death and the types thereafter were often referred to as Weir-Cierva, Cierva-Weir...and Cierva!
 

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Winston

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On ebay.fr I found images of the Cierva C.4 and C.6. Hopefully this is the right category.
 

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hesham

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Nice work my dear Cy-27.
 

hesham

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Skyblazer said:
A Weir design from 1942 found in British patent #563,427:
Hi,

http://kulturserver-nds.de/home/hubtest/medien/Typenkartei3953xGUN7x9T3Z7.pdf
 

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Schneiderman

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Better to go back to the original illustration.

G & J Weir took out many patents in association with their chief engineer/designer Cyril George Pullin. Most related to aspects of power and control of helicopters, including 563427 which was a form of torque control using ducted jets. Another was 5724127 for a 'fenestron', and 556865 which for a torqueless rotor powered by tip jets.
 

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hesham

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Nice find Schneiderman.
 

Schneiderman

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In 1943 the Weir W9 was designed along the lines of the drawings in patent GB563472.
Powered by a Gipsy VI it was estimated to have a top speed of 150mph and cruising speed of 110mph (very, very, optimistic) with sufficient fuel for 4 hours at cruising speed. It would have an all-up weight of 2000lbs loaded; pilot, passenger and fuel. It was to 29ft long, 10ft wide with a rotor 36ft in diameter.


These scans did not come out well so I will redo them when I get a chance
 

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hesham

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Brilliant,thank you my dear Schneiderman.
 

Apophenia

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... the other one I can't ID it.
Cy-27 listed one "project derived from the remains of the W.4 by C.G.Pullin which got no further than the mock-up stage" and "C.G.Pullin, Weir's chief designer, first thought of converting the W.4 autogyro into a helicopter by using two co-axial rotors". That would fit for your "Rotorplane".


As a coaxial design, Cyril Pullin would have been able to ditch the W.4's tractor propeller. Perhaps the coaxial rotors also explain the simplified tail surfaces. The cowling looks odd. That may just be showing the W.4's Weir Pixie engine turned back-to-front to drive the rotors. Or did Pullin intend to design a new, more powerful engine for his coaxial rotor machine?
 

Schneiderman

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Well, not a Cierva patent so probably not. It was taken out by James Bennett who had worked for Cierva in the mid 1930s and held many patents in partnership with the company. Design is similar to projects he developed with Fairey after the war.
 
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