Fokker T.IV
| {{Infobox aircraft begin
|name = T.IV |image = File:Fokker T.IVa drijvervliegtuig 2161 027462.jpg |caption = }}{{Infobox aircraft type |type = Maritime patrol floatplane |manufacturer = Fokker |designer = |first flight = 7 June 1927 |introduced = 1927 |introduction= |retired = 1942 |status = |primary user = Netherlands |more users = Portugal |produced = |number built = 33 |unit cost = |developed from = |variants with their own articles = }} |
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 design
The 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,Gunston 1977, p.85. 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. 12 were built for the Dutch Naval Aviation Service, while the remaining T-IVs were rebuilt to the T-IVa standard.
Operational history
Deliveries of the original T.IV to the Dutch Naval Aviation Service in the Dutch East Indies started in 1927 and continued until 1930.{{cite web | last = Hayles | first = John | url = http://www.aeroflight.co.uk/waf/neth/mLd/types/fokker_TIV.htm | archive-url = https://web.archive.org/web/20220812232154/http://www.aeroflight.co.uk/waf/neth/mLd/types/fokker_TIV.htm | archive-date = 2022-08-12 | title = Netherlands Naval Aviation: Aircraft Types: Fokker T.IV | work = Aeroflight }} The second batch of 12 TIVa aircraft was delivered to the East Indies from 1936 to 1938, and the original T.IVs were rebuilt as T.IVas.Taylor 1989, p.408
The T.IV proved to be a reliable and seaworthy aircraft, 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.Purnell 1978–79, p. 2336. All the remaining T.IVs were destroyed during the Japanese invasion, either by Japanese bombing or scuttling.
Variants
;T.IV
:Original production version, powered by 336 kW (450 hp) Lorraine-Dietrich 12E engines. 18 built.
;T.IVa
:Refined version with Wright SR-1820-F2 Cyclone radial engines, enclosed cockpit and gun turrets. 12 built.
Operators
;{{NED}}
;{{POR}}
- Portuguese Naval Aviation - Portugal received three T.IVs, powered by Rolls-Royce Eagle engines.Taylor 1981, p.145.
Specifications (T.IVa)
File:Fokker_T.IV_3-view_Les_Ailes_January_19,1928.png
{{Aircraft specs
|ref= The Encyclopedia of World Aircraft,Donald 1997, p.440 Jane's all the World's Aircraft 1931{{cite book |title=Jane's all the World's Aircraft 1931 |editor1-last=Grey |editor1-first=C.G. |year=1931 |publisher=Sampson Low, Marston & company, ltd |location=London |pages=185c–186c}}
|prime units?=met
|crew=4
|length m=17.6
|span m=26.2
|height m=6
|wing area sqm=97.8
|aspect ratio=
|airfoil=
|empty weight kg=4665
|gross weight kg=
|max takeoff weight kg=7200
|fuel capacity={{cvt|1500|L|USgal impgal}} in several wing tanks and 2x {{cvt|30|L|USgal impgal}} oil tanks in the engine nacelles.
|more general=
|eng1 number=2
|eng1 name=Wright SR-1820-F2 Cyclone
|eng1 type=9-cylinder air-cooled radial piston engines
|eng1 hp=750
|eng1 note = or 2 x {{cvt|450|hp|order=flip}} Lorraine 12Eb W-12 engines
|prop blade number=2
|prop name=fixed-pitch propellers
|prop dia m=
|prop dia ft=
|prop dia in=
|prop dia note=
|max speed kmh=260
|max speed mach=
|cruise speed kmh=215
|stall speed kmh=
|never exceed speed kmh=
|minimum control speed kmh=
|range km=1560
|combat range km=
|ferry range km=
|endurance=
|ceiling m=5900
|g limits=
|roll rate=
|climb rate ms=
|time to altitude=
|wing loading kg/m2=73.6
|fuel consumption kg/km=
|power/mass={{cvt|0.160|kW/kg}}
|thrust/weight=
|more performance=
|guns= 3 × 7.9 mm (.31 in) Browning machine gun one each in nose and dorsal turrets and ventral position
|bombs= Up to 800 kg (1,764 lb) bombs internally or 1 × torpedo externally.
}}
See also
{{aircontent|
|related=
|similar aircraft=
|sequence=
|lists=
|see also=
}}
References
=Notes=
{{Reflist}}
=Bibliography=
{{refbegin}}
- "THE FOKKER T. IV SEAPLANE: A Twin-Engined Torpedo or Bombing Monoplane". Flight. 26 January 1928. Pages 49–50.
- Donald, David (ed.) The Encyclopedia of World Aircraft. Aerospace Publishing. 1997. {{ISBN|1-85605-375-X}}.
- Gunston, Bill. The Encyclopedia of the World's Combat Aircraft. Feltham, Middlesex, UK,: Hamlyn, 1977. {{ISBN|0-600-33144-X}}.
- Taylor, M.J.H. Warplanes of the World: 1918–1939. Shepperton, Surrey, UK: Ian Allan, 1981. {{ISBN|0-7110-1078-1}}.
- Taylor M.J.H.(Editor). Jane's Encyclopedia of Aviation. London: Bracken, 1989. {{ISBN|1-85170-324-1}}.
- Purnell's Illustrated Encyclopedia of Modern Weapons and Warfare (Part work 1978–1979). London : Phoebus. p. 2336.
{{refend}}
External links
{{Commons category}}
- http://www.airwar.ru/enc/bww1/fokt4.html
- {{webarchive|url=https://web.archive.org/web/20230415062412/http://www.dutch-aviation.nl/index5/Military/index5-1%20T4.html|title=Fokker T.4/T.4a|nolink=yes}}
{{Fokker aircraft}}
Category:1920s Dutch military reconnaissance aircraft