| 词条 | Fokker T.IV | ||||||||||||||||||
| 释义 |
The Fokker T.IV was a Dutch torpedo bomber/maritime reconnaissance floatplane of the 1920s and 1930s. First flying in 1927, it served with the Dutch Naval Aviation Service in the Dutch East Indies until the remaining aircraft were destroyed during the Japanese invasion in 1942. Development and designThe Fokker T.IV was developed to meet the requirements of the Royal Netherlands Navy for a maritime patrol/torpedo bomber aircraft for use in the Dutch East Indies. First flying on June 7, 1927,[1] the T.IV was a twin engined floatplane with a thick, cantilever, high mounted monoplane wing and a deep, slab-sided fuselage with an open cockpit housing the two-man crew. The aircraft could carry either a torpedo or 800 kg (1,764 lb) of bombs, and had a defensive armament of three machine guns in nose, dorsal and ventral positions, The initial version was powered by two {{convert|450|hp|abbr=on}} Lorraine-Dietrich 12E W-12 engines. In 1935, Fokker produced a developed version, the T-IVa, to supplement the existing T-IVs in Dutch service. Wright Cyclone radial engines replaced the Lorraine Dietriches, while the pilots were provided with an enclosed cockpit in a hump over the wing root, and enclosed nose and dorsal gun turrets were fitted.[2] 12 were built for the Dutch Naval Aviation Service, while the remaining T-IVs were rebuilt to the T-IVa standard.[2] Operational historyDeliveries of the original T.IV to the Dutch Naval Aviation Service in the Dutch East Indies started in 1927 and continued until 1930.[2] The second batch of 12 TIVa aircraft was delivered to the East Indies from 1936 to 1938,[2] and the original T.IVs were rebuilt as T.IVas.[3] The T.IV proved to be a reliable and seaworthy aircraft,[7] and continued in use for local patrols and air-sea rescue operations from the naval base at Soerabaja on Java until 1942, when the Japanese attacked the Dutch East Indies.[4] All the remaining TIVs were destroyed during the Japanese invasion, either by Japanese bombing or scuttling.[2][4] Variants
Original production version, powered by 336 kW (450 hp) Lorraine-Dietrich 12E engines. 18 built.[7]
Refined version with Wright SR-1820-F2 Cyclone radial engines, enclosed cockpit and gun turrets. 12 built. Operators
Specifications (T.IVa){{aircraft specifications|plane or copter?=plane |jet or prop?=prop |ref= The Encyclopedia of World Aircraft [6] |crew=4 |capacity= |length main= 17.60 m |length alt= 57 ft 8¾ in |span main= 26.20 m |span alt= 85 ft 11½ in |height main= 6.00 m |height alt= 19 ft 8¼ in |area main= 97.80 m² |area alt= 1,053 ft² |airfoil= |empty weight main= 4,665 kg |empty weight alt= 10,285 lb |loaded weight main= |loaded weight alt= |useful load main= |useful load alt= |max takeoff weight main= 7,200 kg |max takeoff weight alt= 15,873 lb |more general= |engine (prop)=Wright SR-1820-F2 Cyclone |type of prop=9 cylinder radial |number of props=2 |power main= 559 kW |power alt= 750 hp |power original= |max speed main= 260 km/h |max speed alt= 140 kn, 161 mph |cruise speed main= 215 km/h |cruise speed alt= 116 kn, 134 mph |stall speed main= |stall speed alt= |never exceed speed main= |never exceed speed alt= |range main= 1560 km |range alt= 843 NM, 969 mi |ceiling main= 5900 m |ceiling alt= 19,355 ft |climb rate main= |climb rate alt= |loading main= 73.6 kg/m² |loading alt= 15.1 lb/ft² |thrust/weight= |power/mass main= 160 W/kg |power/mass alt= 0.095 hp/lb |more performance= |armament=
|avionics= }} See also{{aircontent||related= |similar aircraft= |sequence= |lists=
|see also= }} ReferencesNotes1. ^Gunston 1977, p.85. 2. ^1 2 Hayles,John. Netherlands Naval Aviation: Aircraft Types: Fokker T.IV Aeroflight. Retrieved 25 March 2008. 3. ^Taylor 1989, p.408 4. ^1 Purnell 1978–79, p. 2336. 5. ^1 2 Taylor 1981, p.145. 6. ^1 2 3 Donald 1997, p.440 Bibliography{{refbegin}}
External links{{Commons category}}
5 : Fokker aircraft|Dutch military reconnaissance aircraft 1920–1929|High-wing aircraft|Aircraft first flown in 1927|Twin piston-engined tractor aircraft |
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