词条 | Douglas Dolphin | ||||||||||||||||
释义 |
The Douglas Dolphin was an amphibious flying boat. While only 58 were built, they served a wide variety of roles: private 'air yacht', airliner, military transport, and search and rescue.[3] {{TOC limit|limit=2}}Design and developmentThe Dolphin originated in 1930 as the "Sinbad," a pure flying boat without wheels. The Sinbad was intended as a luxurious flying yacht. Undaunted by the lack of demand, Douglas improved the Sinbad in 1931 so that it was amphibious, and could land on water or land. The improved aircraft was named "Dolphin", however this did not represent the end of development, as many detail improvements were made, including an increase in the length of over a foot and changes made to the empennage, engine nacelles and wings.[4] The Great Depression had curtailed demand for such extravagance as a "flying yacht", but Douglas managed to interest the United States Coast Guard who not only bought the Sinbad, but 12 Dolphins.[5] Operational historyThe first two were purchased by Wilmington-Catalina Airlines to fly passengers between Los Angeles and Santa Catalina Island, becoming the first successful Douglas airliners. Subsequent examples were ordered by the United States Navy and U.S. Coast Guard for use as transports and search and rescue craft. The U.S. Army Air Corps ordered several under the designations C-21, C-26, and C-29. Many were eventually ordered for their original purpose as luxury transports. Owners included William Boeing, the founder of the Boeing Company, and Philip K. Wrigley, the son of the founder of the Wm. Wrigley Jr. Company. William K. Vanderbilt bought two with custom interiors for use from the Vanderbilt yacht Alva as flying tenders.[6][7] One was procured by the U.S. Navy as a transport for President Franklin D. Roosevelt.[8] Although never used by Roosevelt, this was the first aircraft procured to provide transportation for the President of the United States.[9] In 1933, landing in heavy seas, the USCG RD-4 undertook some rescues of merchant sailors at sea, feats that made spectacular news reports, enthralling the American public.[10] VariantsData from:McDonnell Douglas Aircraft since 1920 Vol.1[1]
The original prototype built as a flying boat, intended to be a luxurious flying yacht, first flown in July 1930. No orders were received for the Sinbad which was eventually bought by the U.S. Coast Guard.
The initial two Dolphins built for the Wilmington-Catalina Airline Ltd. as six-seat airliners.
The Model 1s redesignated after modification to seat eight passengers.
The third commercial Dolphin built as a luxury transport named Lesgo with seats for two crew and four passengers for Powel Crosley Jr., powered by 2x {{convert|300|hp|kW|abbr=on|0}} Pratt & Whitney Wasp Junior A engines. Later impressed into the RAAF as A35-3.
One aircraft named Jade Blanc V for French clothing manufacturer Armand Esders (who also owned a Bugatti Royale) similar to the RD-4, powered by 2x {{convert|550|hp|kW|abbr=on|0}} Pratt & Whitney R-1340-S1H1 Wasp engines.
A single Dolphin built to order for Philip K. Wrigley, powered by 2x {{convert|450|hp|kW|abbr=on|0}} Pratt & Whitney Wasp SC1 engines.
One aircraft for the Armada Argentina (Argentine Navy), powered by 2x {{convert|450|hp|kW|abbr=on|0}} P&W R-1340-96.
One aircraft initially named Rover, bought by William E. Boeing, which ended up in CAA (forerunner of the current Federal Aviation Administration) service. Sole surviving example, painted in USCG markings.
Two aircraft built for A.G. Vanderbilt II and W.K. Vanderbilt II and operated from the yacht Alva. One of the two (which is unknown) joined the RAAF as A35-2.
Two aircraft ordered by Pan American Airways for its subsidiary (at that time) China National Aviation Corporation, powered by 2x {{convert|450|hp|kW|abbr=on|0}} Pratt & Whitney Wasp S3D1 engines. One crashed in heavy seas and the other was destroyed during or shortly after the Japanese invasion of China.
A single Dolphin, powered by 2x {{convert|450|hp|kW|abbr=on|0}} Pratt & Whitney Wasp Junior SB engines, ordered by Standard Oil and later impressed by the RAAF as A35-1.
Several C-21 aircraft loaned to the U.S. Treasury Department for border patrols during Prohibition.
The two Y1C-26 Dolphins during a brief attachment to the U.S. Treasury Department.
The designation used by those Y1C-26A aircraft that were attached to the U.S. Treasury Department.
The two C-29s when in use by the U.S. Treasury Department.
One aircraft, powered by 2x {{convert|435|hp|kW|abbr=on|0}} Wright R-975E radial engines, operated by the U.S. Navy.
Four Dolphin aircraft of two distinct types. One Aircraft similar to the Y1C-21 and powered by 2x {{convert|500|hp|kW|abbr=on|0}} Pratt & Whitney R-1340-10 engines, for the U.S. Coast Guard. Two were U.S. Navy VIP staff transports similar to the Y1C-26 powered by 2x {{convert|450|hp|kW|abbr=on|0}} Pratt & Whitney R-1340-96 engines. The final aircraft was completed for the U.S. Navy as the first presidential aircraft, for Franklin D. Roosevelt, powered initially by 2x {{convert|410|hp|kW|abbr=on|0}} Pratt & Whitney R-1340-1 engines and later by 2x {{convert|500|hp|kW|abbr=on|0}} Pratt & Whitney R-1340-10 engines, seating five though it was reportedly never used by the President.
A utility transport version of the RD-2, six of which were built for the U.S. Navy, powered by 2x {{convert|500|hp|kW|abbr=on|0}} Pratt & Whitney R-1340-4 or by 2x {{convert|500|hp|kW|abbr=on|0}} Pratt & Whitney R-1340-96 engines.
Ten aircraft for the U.S. Coast Guard, powered by 2x {{convert|420|hp|kW|abbr=on|0}} Pratt & Whitney Wasp C1 engines.
C-21 aircraft redesignated.
C-26 aircraft redesignated.
Y1C-26A aircraft redesignated.
C-26B aircraft redesignated, one of which was fitted with an experimental fixed tricycle undercarriage.
Four OA-4A and one OA-4B aircraft modernized in 1936.
Eight aircraft for the USAAS, similar to the Navy's RD-1, powered by 2x {{convert|350|hp|kW|abbr=on|0}} Wright R-975-3 engines.
Two aircraft for the USAAS with increased dimensions, fin area and fuel capacity (from{{convert|180|USgal|l|abbr=on|0}} to {{convert|240|USgal|l|abbr=on|0}}). Powered by 2x {{convert|300|hp|kW|abbr=on|0}} Pratt & Whitney R-985-1 engines.
Eight aircraft for the USAAS differing from the Y1C-26 only in minor details.
Y1C-21 aircraft redesignated.
Y1C-26 aircraft redesignated.
Y1C-26A aircraft redesignated.
Four aircraft powered by 2x {{convert|400|hp|kW|abbr=on|0}} Pratt & Whitney R-985-9 engines.
Two Dolphins, powered by 2x {{convert|550|hp|kW|abbr=on|0}} Pratt & Whitney R-1340-29 engines, were essentially similar to the Y1C-26As. Military operators
Specifications (RD-3 Dolphin){{Aircraft specs|ref=McDonnell Douglas Aircraft since 1920, Vol. 1[11] |prime units?=imp
or 2x {{convert|450|hp|kW|abbr=on|0}} Pratt & Whitney R-1340-96 Wasp engines
See also{{Aircontent|related= |similar aircraft=
|lists=
}} ReferencesNotes1. ^1 2 Francillon 1988, pp. 102–103. 2. ^Francillon 1988, p. 103. 3. ^Francillon 1988, p. 102. 4. ^Francillon 1988, p. 104. 5. ^Rumerman, Judy. "Douglas Aircraft Builds the DC-1 and DC-2." {{webarchive |url=https://web.archive.org/web/20020919230716/http://www.centennialofflight.gov/essay/Aerospace/Douglas-1930s/Aero28.htm |date=September 19, 2002 }} Centennial of Flight, 2003. Retrieved: March 5, 2012. 6. ^Francillon 1988, pp. 105–107. 7. ^Bowers 1982, pp. 11–25. 8. ^Bowers 1982, pp. 49-50. 9. ^[https://books.google.com/books?id=J-IDAAAAMBAJ&pg=PA713&dq=Popular+Science+1933+plane+%22Popular+Mechanics%22&hl=en&ei=adr6TfWEPIq5tgeR_e27Dg&sa=X&oi=book_result&ct=result&resnum=4&sqi=2&ved=0CDYQ6AEwAw#v "Mayflower of the Air ready for President."] Popular Science, May 1933, p. 713. Retrieved: March 5, 2012. 10. ^[https://books.google.com/books?id=T-IDAAAAMBAJ&pg=PA900&dq=true#v=onepage&q=true&f=true "Flying Life Savers."] Popular Mechanics Monthly, December 1933, pp. 900–903. 11. ^Francillon 1988, pp. 110–111. Bibliography{{Refbegin}}
External links{{commons category-inline|Douglas Dolphin}}{{Navboxes|title=Articles and topics related to the Douglas Dolphin |state=collapsed |list1={{Douglas airliners}}{{Douglas aircraft}}{{USAAF observation aircraft}}{{USAF transports}}{{USN transports}} }} 8 : Douglas aircraft|Flying boats|United States civil utility aircraft 1930–1939|United States military transport aircraft 1930–1939|Amphibious aircraft|High-wing aircraft|Aircraft first flown in 1930|Twin piston-engined tractor aircraft |
||||||||||||||||
随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识,基本涵盖了大多数领域的百科知识,是一部内容自由、开放的电子版国际百科全书。