Continental XR-1740-2, Sleeve Valve, Radial 14 Engine
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"guid": "http://n2t.net/ark:/65665/nv9ccc406fc-2d5d-4e8c-b497-b8722c0bd61c", "record_link": "http://n2t.net/ark:/65665/nv9ccc406fc-2d5d-4e8c-b497-b8722c0bd61c", "title": {"label": "Object Name", "content": "Continental XR-1740-2, Sleeve Valve, Radial 14 Engine"}, "metadata_usage": {"access": "CC0"}, "data_source": "National Air and Space Museum"}, "indexedStructured": {"geoLocation": [{"L2": {"type": "Country", "content": "United States of America"}}], "object_type": ["Rotary engines", "Reciprocating (piston) engines", "Propulsion systems"], "name": ["Continental, Inc."], "place": ["United States of America"], "usage_flag": ["Aviation", "Piston", "Propulsion", "Engines", "World War II"], "online_media_type": ["Images"]}, "freetext": {"setName": [{"label": "See more items in", "content": "National Air and Space Museum Collection"}], "date": [{"label": "Date", "content": "Circa 1941"}], "identifier": [{"label": "Inventory Number", "content": "A19710891000"}], "notes": [{"label": "Physical Description", "content": "Type: Reciprocating, 14 cylinders, 2 rows, radial, air-cooled, direct fuel injection, single-speed centrifugal supercharger"}, {"label": "Physical Description", "content": "Power rating: 652 kW (875 hp) at 2,600 rpm"}, {"label": "Physical Description", "content": "Displacement: Not available"}, {"label": "Physical Description", "content": "Bore and Stroke: Not available"}, {"label": "Physical Description", "content": "Weight: 630 kg (1,388 lb)"}, {"label": "Summary", "content": "In 1925, Continental, a successful manufacturer of automotive engines, purchased the rights for a Burt-McCollum single-sleeve valve engine design. Believing this technology might replace poppet valves in aircraft engines, Continental announced the R-790 engine in 1927, incorporating single-sleeve valves initially installed on a Wright 9-cylinder engine. It was never fully tested, but followed by the 7-cylinder R-794, for which five engines were ordered by the U.S. Navy in 1934. It was tested, but did not go into production."}, {"label": "Summary", "content": "The Navy later sponsored a number of unconventional engine designs; however, few entered production. In the case of the 1939 XR-1740-2 development, the outcome was apparently typical of single-sleeve valve history. For example, Bristol\u00e2\u0080\u0099s Roy Fedden, one of history\u00e2\u0080\u0099s great aircraft engine experts, was unable to mass produce single-sleeve engines. Continental only became successful after reverting to poppet valves, and this artifact represents a seemingly simple new concept that could not compete with older, conventional technology better developed for practical application."}], "creditLine": [{"label": "Credit Line", "content": "Transferred from the U.S. Navy"}], "name": [{"label": "Manufacturer", "content": "Continental, Inc."}], "place": [{"label": "Country of Origin", "content": "United States of America"}], "physicalDescription": [{"label": "Materials", "content": "Steel, Aluminum, paint, Plastic, Copper, Stainless Steel, Rubber, Magnesium"}, {"label": "Dimensions", "content": "Height 134.6 cm (53 in.), Length 176.5 cm (69.5 in.), Width 132.7 cm (52.25 in.)"}], "dataSource": [{"label": "Data Source", "content": "National Air and Space Museum"}], "objectRights": [{"label": "Restrictions & Rights", "content": "CC0"}], "objectType": [{"label": "Type", "content": "PROPULSION-Reciprocating & Rotary"}]}}, "url": "edanmdm:nasm_A19710891000", "hash": "031a64eb7b414ea9f7bdb186a7c50d8d134fa4e6", "docSignature": "c7b3c7278ae466253555effe5b5b1190", "timestamp": 1666664365, "lastTimeUpdated": 1653682064, "title": "Continental XR-1740-2, Sleeve Valve, Radial 14 Engine"}