| 词条 | Douglas DF | |||||||||||||||
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The Douglas DF was a commercial flying boat built by Douglas Aircraft Company and which first flew on 24 September 1936. It could accommodate 32 passengers, or 16 in sleeper cabins, and was the last flying boat built by the company. Despite acceptable handling and performance within design specifications, no commercial orders were forthcoming and faced with no domestic market for aircraft already built, the company obtained export permits for them. The first two production aircraft were sold to Japan, ostensibly for commercial airline use, however one of them was dismantled, reverse-engineered and formed the basis for the development of the Kawanishi H8K. The second one was lost on a survey flight in 1938. The second production pair were sold (as DF-195's) to the Soviet Union and after winterizing, were disassembled and transported to Russia via ship, where they were operated as transports by Aeroflot. Specifications{{aerospecs|ref=[1] and [2] |met or eng?=eng |crew=4 |capacity=32 |length m=21.3 |length ft=69 |length in=10 |span m=28.86 |span ft=95 |span in= |height m=7.47 |height ft=24 |height in=6 |wing area sqm=120.31 |wing area sqft=1,295 |empty weight kg=7,854 |empty weight lb=17,315 |gross weight kg=12,927 |gross weight lb=28,500 |eng1 number=2 |eng1 type=Wright SGR-1820G-2 radial piston |eng1 kw=746 |eng1 hp=1,000 |eng2 number= |eng2 type= |eng2 kw= |eng2 hp= |max speed kmh=286 |max speed mph=178 |cruise speed kmh=257 |cruise speed mph=160 |stall speed kmh= |stall speed mph= |range km=5,311 |range miles=3,300 |endurance h= |endurance min= |ceiling m=4,235 |ceiling ft=13,900 |climb rate ms=4.05 |climb rate ftmin=800 }}{{aircontent |see also= |related= |similar aircraft= |lists= }} References1. ^1 {{cite book |last= Sharpe |first= Michael |title= Biplanes, Triplanes, and Seaplanes |year=2000 |publisher=Friedman/Fairfax Books |location=London |pages= 162|isbn=1-58663-300-7}} 2. ^{{cite web |url=http://1000aircraftphotos.com/Contributions/Braas/9317.htm|title= NICO BRAAS COLLECTION, No. 9317. Douglas DF-151|date=31 October 2009 |website=1000AircraftPhotos.com |access-date=10 April 2015}} External links{{commons category|Douglas DF}}{{Douglas airliners}}{{aero-1930s-stub}} 4 : Douglas aircraft|United States airliners 1930–1939|Aircraft first flown in 1936|Twin piston-engined tractor aircraft |
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