of the delta wing, particularly during the crucial phases of takeoff and landing. This work was supported by several radio-controlled scale models of the HP.115. Following the installation of Hartmann noise generators, the aircraft had also been used to study the acoustic properties presented by the configuration. By the time of its retirement, the HP.115 had reportedly accumulated roughly 500 flight hours, which was the aircraft's original design limit. Aircraft on display Following its retirement at RAE Bedford, XP841 was placed on display at the museum at RAF Colerne. Following closure of the Colerne museum, the aircraft was relocated to the Royal Air Force Museum Cosford and placed on display. With the opening of the Concorde exhibition at the Fleet Air Arm Museum, XP841 was moved south to RNAS Yeovilton. XP841 is on display as part of "The Leading Edge Exhibition," alongside the BAC 221 and a Concorde prototype. Operators Royal Aircraft Establishment Specifications (HP.115) See also References Citations Bibliography Barnes, C. H. Handley Page Aircraft since 1907. London: Putnam, 1976. . Buttler, Tony and Jean-Louis Delezenne. X-Planes of Europe: Secret Research Aircraft from the Golden Age 1946-1974. Manchester, UK: Hikoki Publications, 2012. Barfield, Norman. "Aérospatiale/BAC Concorde." Aircraft in Profile, Volume 14. Windsor, Berkshire, UK: Profile Publications, 1974. . Barnes, C. H. Handley Page Aircraft Since 1907. London: Putnam & Company, Ltd., 1987. . Clayton, Donald C. Handley Page, an Aircraft Album. Shepperton, Surrey, UK: Ian Allan Ltd., 1969. . Winchester, Jim. "Handley Page HP.115 (1961)." X-Planes and Prototypes: From Nazi Secret Weapons to the Warplanes of the Future. London: Amber Books Ltd., 2005. . External links Fleet Air Arm Website 1960s British experimental aircraft Aircraft first flown in 1961 Concorde HP.115 Single-engined jet aircraft Tailless delta-wing aircraft