Fokker T.IV

infobox Aircraft
name = T.IV
type = Maritime patrol floatplane
manufacturer = Fokker


caption =
designer =
first flight = 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 30s. 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. An open cockpit housed the two pilots, while the aircraft had a defensive armament of three machine guns in nose, dorsal and ventral positions, while carrying either a torpedo or 800 kg of bombs. The initial version was powered by two convert|450|hp|abbr=on Lorraine-Dietrich broad arrow 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. Twelve 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. Hayles,John. [http://www.aeroflight.co.uk/waf/neth/mld/types/fokker_TIV.htm Netherlands Naval Aviation: Aircraft Types: Fokker T.IV] "Aeroflight". Retrieved 25 March 2008.] The second batch of 12 TIVa aircraft was delivered to the East Indies from 1936 to 1938, with the original T.IVs being 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.] Al, the remaining TIVs were destroyed during the Japanese invasion, either being destroyed by Japanese bombing or scuttled.

Variants

;T.IV:Original production version, powered by 450 hp (336 kW) Lorraine Dietrich engines. 18 built. ;T.IVa:Refined version with Cyclone radial engines, enclosed cockpit and gun turrets. 12 built.

Operators

;NED
*Dutch Naval Aviation Service;POR
*Portugal received three T.IVs, powered by Rolls-Royce Eagle engines. Taylor 1981, p.145.]

pecifications (T.IVa)

aircraft specifications

plane or copter?=plane
jet or prop?=prop

ref= The Encyclopedia of World Aircraft Donald 1997, p.440]
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 knots, 161 mph
cruise speed main= 215 km/h
cruise speed alt= 116 knots, 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=
*Single 7.9 mm Browning machine guns in nose and dorsal turrets and ventral position.
*Up to 800 kg (1,764 lb) bombs internally "or" one torpedo externally.
avionics=

ee also

aircontent

related=
similar aircraft=
sequence=
lists=*List of seaplanes and flying boats
see also=

References

Notes

Bibliography

* "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 0 600 331 44 X.
* Taylor, M.J.H. "Warplanes of the World: 1918-1939". Shepperton, Surry, UK: Ian Allen, 1981. ISBN 07110 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.

External links

*http://www.aviastar.org/air/holland/fokker_t-4.php
*http://www.airwar.ru/enc/bww1/fokt4.html
*http://www.dutch-aviation.nl/index5/Military/index5-1%20T4.html