British Experimental Rotor Program

The BERP rotor blade design was developed under the British Experimental Rotor Programme. The initial BERP rotor blades were developed in the late 1970s to mid-1980s as a joint venture programme between Westland Helicopters and the Royal Aircraft Establishment, with Professor Martin Lowson as a co-patentee.[1] The goal was to increase the helicopters lifting-capability and maximum speed using new designs and materials.

BERP III designs have a notch toward the outer end of the rotor blade, with a greater amount of sweepback from the notch to the end of the blade compared to inboard of the notch.[2]

The initial programme, BERP I, studied the design, manufacture and qualification of composite rotor blades. This resulted in producing new main rotor and tail rotor blades for the Westland Sea King. Following on from the first, the second programme, BERP II, analysed advanced aerofoil sections for future rotor blades. This fed into the BERP III programme that culminated in a technology demonstration on a Westland Lynx helicopter.[3] In 1986, a Lynx specially modified registered G-LYNX and piloted by Trevor Egginton set an absolute speed record for helicopters over a 15 and 25 km course by reaching 400.87 km/h (249.09 mph).[2] Following the successful technology demonstration, the BERP III blade went into production.

Current applications are:

AgustaWestland AW101
Upgraded Westland Super Lynx
  • BERP IV:
AgustaWestland AW101
VH-71 Kestrel


Further reading

  • Brocklehurst, Alan. AIAA-1990-3008, "Experimental and numerical study of the British Experimental Rotor Programme blade". AIAA, 1990.

External links

  • The British Experimental Rotor Program (BERP) Blade
  • Air Vectors: The Westland Scout, Wasp, & Lynx
  • "Fastest Blades in the World" a 1986 Flight article on the Lynx's BERP rotor
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, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for 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.