Tag Archives: BERP

9 October 1987

PP1, the first prototype of the EH101, ZF 641. (Paul Thallon)
PP1, the first prototype of the EH101, ZF 641. (Paul Thallon)

9 October 1987: Westland Helicopters Ltd. Chief Test Pilot John Trevor Eggington and Deputy Chief Test Pilot Colin W. Hague take PP1, the first EH 101 prototype, for its first flight at Yeovil, Somerset, United Kingdom. The helicopter had been completed 7 April 1987 and underwent months of ground testing.

A medium-lift helicopter, the EH 101 was a joint venture of Westland and Costruzioni Aeronautiche Giovanni Agusta S.p.A. of Italy, known then as European Helicopter Industries, or EHI, to produce a replacement for the Sikorsky S-61 Sea King, which both companies built under license. The Italian and British companies merged in July 2000 and are now known as AgustaWestland NV, with corporate headquarters in the Netherlands. After the merger of the two helicopter manufacturers, the EH 101 was redesignated AW101. It is also known as the Merlin.

Canadian Forces CH-149 Cormorant, a search and rescue variant of the AgustaWestland AW101. (Korona4Reaal via Wikipedia)
Canadian Forces CH-149 Cormorant 149902, a search and rescue variant of the AgustaWestland AW101. (Korona4Reel via Wikipedia)

Nine prototypes were built, four by Agusta at Vergiate, Italy, and five by Westland at Yeovil. During testing, Agusta-built PP2 and Westland’s PP4 were destroyed.

PP1, the first prototype, was powered by three General Electric CT7-2A turboshaft engines which were rated at 1,625 shaft horsepower, each. In production, Rolls-Royce/Turbomeca RTM322 engines are optional, as are the more powerful CT7-8s. Produced in both military and civil variants, the Merlin is used in search-and-rescue, anti-submarine warfare, mine countermeasures, airborne early warning and utility configurations. Production began in 1995 and continues today.

The AgustaWestland AW101 Merlin is a single main rotor/tail rotor medium helicopter powered by three turboshaft engines. It is equipped with retractable tricycle landing gear. The helicopter may be flown by a single pilot and uses a digital flight control system. The actual flight crew is dependent on aircraft configuration and mission.

The five blade composite main rotor has a diameter of 61 feet, 0 inches (18.593 meters) and turns counterclockwise as seen from above. (The advancing blade is on the helicopter’s right side.) The blades use a BERP feature that was pioneered on the Westland Lynx AH.1 Lynx, G-LYNX, which Trevor Eddington flew to a world speed record, 11 August 1986. This allows higher speeds, greater gross weight and is quieter than a standard blade. A four blade tail rotor with a diameter of 13 feet, 1 inch (3.962 meters) is positioned on the left side of the tail boom in pusher configuration. It rotates clockwise as seen from the helicopter’s left. The tail rotor pylon is inclined to the left.

PP.5 parked aboard HMS iron Duke. (Royal Navy)
PP5, the prototype  ASW variant parked aboard HMS Iron Duke (F234). (Royal Navy)

Overall length of the AW101 is 74 feet, 10 inches (22.809 meters) with rotors turning. The fuselage is 64 feet, 1 inch (19.533 meters) long. Overall height of the helicopter is 18 feet, 7 inches (5.664 meters). Its empty weight is 20,018 pounds (9,080 kilograms) and the maximum takeoff weight (MTOW) is 34,392 pounds (15,600 kilograms).

The RTM322 engine was developed as a joint venture between Rolls-Royce and Turboméca, but is now a Safran Helicopter Engines product. The RTM322 02/8 is a modular reverse-flow turboshaft engine with a 3-stage axial-flow, 1 stage centrifugal-flow compressor and 2-stage high-pressure, 2-stage power turbine. The output drive shaft turns 20,900 r.p.m. The RTM322 02/08 is rated at 2,000 shaft horsepower, and 2,270 shaft horsepower for takeoff. It has a One Engine Inoperative (OEI) rating of 2,472 shaft horsepower (30 minute limit). The engine is 3 feet, 10.1 inches (1.171 meters) long, 2 feet, 1.5 inches (0.648 meters) in diameter and weighs 503 pounds (228.2 kilograms).

The AW101’s cruise speed is 278 kilometers per hour (150 knots). The hover ceiling in ground effect (HIGE) is 3,307 meters (10,850 feet). In utility configuration, the Merlin carries fuel for 6 hours, 30 minutes of flight and has a maximum range of 1,363 kilometers (735 nautical miles).

John Trevor Egginton, Chief Test Pilot, Westland Helicopters. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)
John Trevor Eggington, Chief Test Pilot, Westland Helicopters. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)

Trevor Eggington retired from Westland in 1988 and Colin Hague became the company’s chief test pilot. In 2003, Hague was appointed an Officer of the Most Excellent (OBE) Order of the British Empire for his contributions to aviation.

Deputy Chief Test Pilot Colin W.Hague, with the first prototype EH101, PP1. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)
Deputy Chief Test Pilot Colin W. Hague, with the first prototype EH101, PP1. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)

Since 2010, PP1 has been used as an instructional airframe for maintenance personnel at RNAS Culdrose, Cornwall, UK.

ZF641, the first prototype of the EH101 (AW101) Merlin, at RNAS Culdrose, 2010. (dyvroeth)
ZF 641, the first prototype of the EH 101 (AW101) Merlin, at RNAS Culdrose, 2010. (dyvroeth)

© 2016, Bryan R. Swopes

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11 August 1986: The World’s Fastest Helicopter

Westland Lynx AH.1 G-LYNX.

11 August 1986: A modified factory demonstration Westland Lynx AH.1 helicopter, civil registration G-LYNX, piloted by Chief Test Pilot John Trevor Egginton and Flight Test Engineer Derek J. Clews, set a Fédération Aéronautique Internationale (FAI) Absolute Record for Speed for helicopters over a straight 15/25 km course with an average speed of 400.87 kilometers per hour (249.09 miles per hour) over a measured 15 kilometer (9.32 miles) course near Glastonbury on the Somerset Levels and Moors, Southwest England.¹ ² ³

Westland WG.13 Lynx G-LYNX, c/n 102. (Vertipedia)

The helicopter was equipped with experimental BERP main rotor blades and two Rolls Royce Gem 60 turboshaft engines with digital electronic fuel control and water-methanol injection, producing 1,345 shaft horsepower, each. The engines’ exhausts were modified to provide 600 pounds of thrust (2,669 Newtons). The horizontal tail plane and vertical fins from a Westland WG.30 were used to increase longitudinal stability and to unload the tail rotor in forward flight. In an effort to reduce aerodynamic drag, items such as steps, antennas and windshield wipers were removed.

During the speed runs, the main rotor blade tips reached a speed of 0.97 Mach.

Four passes over the course were made at an altitude of 500 feet (150 meters). The results of the two best successive passes were averaged. This set records for helicopters; helicopters in the 3,000–4,500 kilogram weight class; and an Absolute World Record for Rotorcraft. Thirty-two years later, these official speed records still stand.

Westland Lynx AH.1, G-LYNX. This is the World's Fastest Helicopter. (Westland)
Westland Lynx AH.1, G-LYNX. This is the World’s Fastest Helicopter. (Westland)

Another Westland AH.1 Lynx, flown by then Westland Chief Pilot Leonard Roy Moxham and Michael Ball, had set two FAI World Records for Speed, 20 and 22 June 1972. Flying over a straight 15/25 kilometer course, the Lynx averaged 321.74 kilometers per hour (199.92 miles per hour).⁴ Two days later, the Lynx flew a closed 100 kilometer circuit at an average speed of 318.50 kilometers per hour (197.91 miles per hour).⁵ Both of these records were for helicopters in the 3,000–4,500 kilogram weight class.

Westland WG.13 c/n 102 made its first flight in May 1979. After setting the speed record, G-LYNX was used as a demonstrator and as a test platform, before finally being retired in 1992. Beginning in 2007, AgustaWestland restored the Lynx to its speed record configuration, withe more than 25,000 man hours expended on the project.

G-LYNX was unveiled on 11 August 2011, the 25th anniversary of the world record flight. Today, it is on display at The Helicopter Museum, Weston-super-Mare, Somerset, South West England.

On 25 September 2014, the Institution of Mechanical Engineers bestowed its Engineering Heritage Award on G-LYNX. John Wood, chairman of the Institution said,

“The G-Lynx helicopter is a remarkable example of British engineering and vision. It is a testament to the cutting-edge modifications made to the helicopter, that the world speed record still stands 28 years later.

“This award is in recognition of all the people in making the 1986 record possible, but also to the AgustaWestland apprentices who restored the helicopter in 2011 and the Helicopter Museum who continue to maintain the craft in such excellent condition.”

The Engineering Heritage Award was accepted by Elfan Ap Rees, founder of the Helicopter Museum, and John Trevor Egginton, pilot of the world record helicopter.

John Trevor Egginton, O.B.E., A.F.C., FRAeS. Chief Test Pilot, Westland Helicopters. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight test Engineers)

John Trevor Egginton was born in Birmingham, England, 14 March 1933. He was the second child of Alfred T. Egginton and Emma Hammond Egginton. John attended the George Dixon Grammar School at Edgbaston, a suburb of Birmingham.

In 1951, Egginton joined the Royal Air Force. On 7 May 1952, he was appointed a cadet pilot, with date of service from 2 January 1952. He was sent to the United States for flight training, and returned to England aboard RMS Queen Elizabeth, arriving at Southampton, 17 November 1953. He flew the Canadair CL-13 Sabre Mk.4 with No. 67 Squadron and the Hawker Hunter with Nos. 222 and 63 Squadrons.

In December 1956, Pilot Officer Egginton married Miss Joan Mary Wheeler at Bromsgrove, near Birmingham. They would have three children, Jane, Michael and Frazer.

Pilot Officer Egginton was promoted to the rank of Flight Lieutenant, 2 October 1957. His commission was made permanent, 31 August 1961.

Following an overseas tour of duty in the Colony of Aden, Flight Lieutenant Egginton transitioned to helicopters, training in the Bristol Sycamore. He was then assigned to No. 22 Squadron at RAF Chivenor, on the north coast of Devon, as a search and rescue pilot. The squadron was equipped with the Westland Whirlwind HAR.2, a licensed variant of the Sikorsky S-55. In August 1962, the unit upgraded to the turboshaft-powered Whirlwind HAR.10.

On the night of 2–3 November 1962, the French fishing trawler Jeanne Gougy, with a crew of 18 men, went aground at Land’s End, Cornwall. A Royal Air Force helicopter from RAF Chivenor and a lifeboat from the Sennen Cove life boat station went to the scene. The lifeboat was unable to approach the wreck because of the heavy weather, but recovered two dead fishermen offshore. The helicopter also recovered a body. No other sailors were seen, the the two rescue craft returned to there bases with the remains.

Later that morning, observers from the shore saw several men inside the Jeanne Gougy‘s pilot house. A helicopter and the Penlee lifeboat, Soloman Brown, hurried to the scene, but conditions were still too extreme for the lifeboat to approach the trawler.

The Westland Whirlwind, flown by Flight Lieutenants John Lorimer Neville Canham, D.F.C., and John Trevor Egginton, hovered over the capsized fishing trawler while the winch operator, Sergeant Eric Charles Smith, was lowered to the ship’s pilot house. A rescue line was also rigged to the nearby rocks. Sergeant Smith rigged two men for hoisting to the hovering helicopter and continued searching for additional survivors. Four sailors were rescued by the line to the shore. 12 of the fishermen did not survive.

Westland Whirlwind HAR.10, No. 22 Squadron, hoists a man from the fishing trawler Jeanne Gougy at Armoured Knight Rock, Land’s End, Cornwall, England, 3 November 1962. (RNLI Penlee Lifeboat Station)
Sergeant Eric Smith, RAF, is lowered to the wreck of Jeanne Gougy, 3 November 1962. (BFI)

For his bravery during the rescue, Sergeant Smith was awarded the George Medal by Queen Elizabeth II. He was also awarded the Silver Medal of the Société des Hospitalers Sauveteurts Bretons.

The President of the French Republic, Charles de Gaulle, conferred the honor of Chevalier du Mérite Maritime on Flight Lieutenant Canham, Flight Lieutenant Egginton, and Sergeant Smith. On 13 June 1964, Egginton was awarded the Air Force Cross.

In 1965, Flight Lieutenant Egginton attended the Empire Test Pilots’ School at RAF Boscombe Down. On graduation, he was assigned as a helicopter test pilot with D Squadron (now the Rotary Wing Test and Evaluation Squadron, or RWTES). In 1969, Egginton returned to the Test Pilots’ School as a helicopter flight instructor.

Squadron Leader Egginton retired from the Royal Air Force in 1973. He was awarded the Queen’s Commendation for Valuable Service in the Air, 2 June 1973. (London Gazette No. 45984 at Page 6463)

Egginton joined Westland Helicopters at Yeovil as deputy chief test pilot, and later became the company’s chief test pilot. He from Westland retired after 15 years.

In the 1989 New Year’s Honours List, Squadron Leader Egginton was appointed an Officer of the Most Excellent Order of the British Empire (O.B.E.):

Squadron Leader John Trevor Egginton, O.B.E., A.F.C., F.R.Ae.S., Q.C.V.S.A., Chevalier du Mérite Maritime, died at his home in Yeovil, 23 November 2014. He was 81 years of age.

In April 2013, Trevor Egginton spoke to members of the Empire Test Pilots’ School at The Helicopter Museum, Weston-super-Mare. In this photograph, Mr. Egginton is seated in the World Record Helicopter’s pilot seat. (The Helicopter Museum)

¹ FAI Record File Number 11659: Rotorcraft, Absolute Record for Speed Over a 15–25 Kilometer Straight Course

² FAI Record File Number 1842: Rotorcraft, Helicopters, Subclass E-1e, 3,000–4,500 kilograms (6,613.9–9,920.8 pounds), takeoff weight

³ FAI Record File Number 1843: Rotorcraft, Helicopters, Subclass E-1

⁴ FAI Record File Number 1826: Rotorcraft, Helicopters, Subclass E-1e

⁵ FAI Record File Number 1853: Rotorcraft, Helicopters, Subclass E-1e

Westland Lynx G-LYNX.

© 2018, Bryan R. Swopes

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