| 词条 | Douglas XFD | |||||||||
| 释义 |
The Douglas XFD was a carrier-based biplane fighter aircraft designed for the United States Navy, and the first fighter to be built by the Douglas Aircraft Company. A victim of changing requirements, no production was undertaken. Design and developmentThe XFD was designed to the U.S. Navy's Bureau of Aeronautics (BuAer) Specification No. 311, requesting a carrier-based two-seater biplane fighter.[1] On June 30, 1932, the Navy ordered the XFD, Vought XF3U, and Curtiss XF12C for testing.[2] The first naval fighter designed by Douglas Aircraft,[3] the XFD was constructed of metal, with a fabric outer covering. The crew sat in tandem in a single bay, enclosed by a long canopy. It had fixed landing gear with a tailwheel. It was designed to be armed with two {{convert|.30|in|abbr=on}} machine guns, one fixed in the cowling and the other on a flexible mount for the observer, and a {{convert|500|lb|adj=on}} cound be carried.[4] Powered was supplied by a Pratt & Whitney R-1535 Twin Wasp Junior radial engine.[4] Operational historyThe XFD-1 prototype first flew in January 1933;[2] it was delivered to the U.S. Navy for trials at Naval Air Station Anacostia in June 1933, within four days of the delivery of the Vought XF3U-1;[4] evaluations of the types were undertaken between June 18, 1933 and August 14, 1934.[2] While the XFD-1's performance was considered to be acceptable, the U.S. Navy's operational requirements were already changing to see the two-seat fighter concept falling out of favor, the scout bomber being considered more useful for the Navy's needs, and accordingly after the end of the XFD-1's flight trials no further orders were placed for the type.[4] Specifications{{Aircraft specs|ref=Angelucci 1987[2], Johnson 2011[4] |prime units?=imp |crew=Two (pilot and observer) |capacity= |length m= |length ft=25 |length in=4 |length note= |span m= |span ft=31 |span in=6 |span note= |height m= |height ft=25 |height in=4 |height note= |wing area sqm= |wing area sqft=295 |wing area note= |aspect ratio= |airfoil= |empty weight kg= |empty weight lb=3227 |empty weight note= |gross weight kg= |gross weight lb=5000 |gross weight note= |max takeoff weight kg= |max takeoff weight lb= |max takeoff weight note= |fuel capacity= |more general= |eng1 number=1 |eng1 name=Pratt & Whitney R-1535-64 |eng1 type=14-cylinder air-cooled radial engine |eng1 kw= |eng1 hp=700 |eng1 note= |power original= |more power= |prop blade number=2 |prop name=Hamilton Standard |prop dia m= |prop dia ft= |prop dia in= |prop note= |max speed kmh= |max speed mph=204 |max speed kts= |max speed note= |max speed mach= |cruise speed kmh= |cruise speed mph=170 |cruise speed kts= |cruise speed note= |stall speed kmh= |stall speed mph= |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |range km= |range miles= |range nmi= |range note= |combat range km= |combat range miles=576 |combat range nmi= |combat range note= |ferry range km= |ferry range miles= |ferry range nmi= |ferry range note= |endurance= |ceiling m= |ceiling ft=23700 |ceiling note= |g limits= |roll rate= |glide ratio= |climb rate ms= |climb rate ftmin=1670 |climb rate note= |time to altitude= |lift to drag= |wing loading kg/m2= |wing loading lb/sqft= |wing loading note= |disk loading kg/m2= |disk loading lb/sqft= |disk loading note= |fuel consumption kg/km= |fuel consumption lb/mi= |power/mass= |thrust/weight= |more performance= |guns=1 x .30-caliber machine gun, fixed forwards-firing cowl mounting 1 x .30-caliber machine gun, flexible mounting in rear cockpit |bombs={{convert|500|lb}} external |rockets= |missiles= |hardpoints= |hardpoint capacity= |hardpoint rockets= |hardpoint missiles= |hardpoint bombs= |hardpoint other= }} See also{{commonscat|Douglas XFD}}{{aircontent|see also= |related= |similar aircraft=
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}} ReferencesCitations1. ^Yenne 1985, p. 64. 2. ^1 2 3 Angelucci, 1987. pp. 182-183. 3. ^Pattillo 2001, p. 111. 4. ^1 2 3 4 Johnson 2011, p. 84. Bibliography{{refbegin}}
6 : Douglas aircraft|United States fighter aircraft 1930–1939|Single-engined tractor aircraft|Biplanes|Carrier-based aircraft|Aircraft first flown in 1933 |
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