World Library  
Flag as Inappropriate
Email this Article

Saro P.531

Article Id: WHEBN0022824452
Reproduction Date:

Title: Saro P.531  
Author: World Heritage Encyclopedia
Language: English
Subject: Folland Midge, BAC Strikemaster, List of aircraft (S), Royal Air Force, Avro Vulcan
Collection: British Helicopters 1950–1959, British Military Utility Aircraft 1950–1959, Saro Aircraft
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Saro P.531

P.531
First P.531-0, G-APNV at the Farnborough show 1958
Role Five-seat utility helicopter
Manufacturer Saunders-Roe
First flight 20 July 1958
Introduction 1959
Primary user Fleet Air Arm
Number built 6
Variants Westland Scout
Westland Wasp

The Saro P.531 (or Saunders-Roe P.531) is a British all-metal five-seat helicopter designed and built by Saunders-Roe Limited (Saro).

Contents

  • Development 1
  • Variants 2
  • Operators 3
  • Aircraft on display 4
  • Specifications (P.531, G-APNU) 5
  • See also 6
  • References 7
  • External links 8

Development

Design of the P.531[1][2] was started in November 1957 as a private venture improvement of the company's earlier Skeeter.[3] The first prototypes were powered by a derated 325 shp Blackburn Turbomeca Turmo 600, a free turbine engine allowing clutchless transmission. The P.531 first flew on the 20 July 1958.[1] Three more developed P.531-0s followed and these were delivered to the Royal Navy/Fleet Air Arm for trials and familiarisation. Following evaluation by the Navy a batch of 30 developed aircraft were eventually ordered as the Westland Wasp.

Two militiarised P.531-2s were completed in 1959, powered by the Blackburn Nimbus and the de Havilland Gnome H1000 free-turbine engines, both derated to 635 hp now that the transmission tests had proved such powers acceptable. Like the Turmo installation, these engines were mounted, uncowled behind the cabin for easy servicing. There were aerodynamic shape revisions and a floor extension to allow six, rather than five seats. The vision was improved with perspex panels in the doors, tankage was increased and all-metal rotors introduced. These modifications increased gross weight by 1,200 lb (544 kg).

Saro had an order for eight pre-production aircraft from the Army Air Corps for evaluation and trials; these would have been known as the Saro Sprite, but the company was taken over by Westland and the aircraft became the first Scout A.H.1s.

Another P.531-2 was built for evaluation by the Indian government[4] but following a lack of interest was re-worked as Scout standard for the Army Air Corps.

Variants

[2]

P.531
Prototype powered by the Turmo 600, one built. Had a short tailplane for c.g. adjustment, though not always installed.
P.531-0
Three further prototypes with full scale tailplane, Turmo powered. All three were used by the Navy, with many deck landings; these flights fed into the later development of the Westland Wasp.
P.531-2
Militarised version for both Army and Navy use, powered by a slightly derated 635 hp (474 kW) Blackburn Nimbus free-turbine engine. Two built by Saro, the second initially powered by a de Havilland Gnome H.1000, derated to 635 hp. It was later developed as the forerunner of the Westland Scout.

Operators

 United Kingdom

Aircraft on display

First P.531-0 prototype, XN332 ex-G-APNV in storage at RNAS Yeovilton in 2005
  • The second and third prototypes are held by the Fleet Air Arm Museum for display.

Specifications (P.531, G-APNU)

Data from [5]

General characteristics
  • Crew: 2
  • Capacity: 3
  • Length: rotors folded 29 ft 0 in (8.84 m)
  • Main rotor diameter: 32 ft 6 in (9.91 m)
  • Height: 9 ft 6 in (2.90 m)
  • Empty weight: 2,092 lb (949 kg)
  • Gross weight: maximum overload 3,800 lb (1,724 kg)
  • Powerplant: 1 × Blackburn-Turbomeca Turmo turboshaft, derated to 325 hp (242 kW)

Performance

  • Maximum speed: 121 mph (194 km/h)
  • Cruise speed: 108 typical mph (175 km/h)
  • Range: 242 miles (390 km)
  • Service ceiling: free hover 2,300 ft (700 m)
  • Rate of climb: initial 540 ft/min (2.74 m/s)

See also

Related development
Related lists

References

Notes
  1. ^ a b Jackson 1974, p 295 and 329
  2. ^ a b London 1988, pp. 263–76
  3. ^ Orbis 1985, p 3093
  4. ^ British Military 1983, p 140.
  5. ^ London 1988, pp. 272
Bibliography
  • The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing. 
  • Jackson, A.J. (1974). British Civil Aircraft since 1919 Volume 3. London: Putnam.  
  • London, Peter (1988). Saunders and Saro Aircraft since 1917. London: Putnam Publishing.  
  • British Military Aircraft Serials and Markings. British Aviation Research Group. 1983.  

External links

  • "Saunders-Roe P.531" a 1958 Flight article
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.