Fokker S-11

S11 Instructor

Role	Trainer
Manufacturer	Fokker
First flight	18 December 1947
Primary users	Royal Netherlands Air Force Royal Netherlands Navy Brazilian Air Force Israeli Air Force

The Fokker S-11 Instructor is a single engine two seater propeller aircraft designed and manufactured by the former Dutch aircraft manufacturer Fokker.

History

One of the first activities undertaken by Fokker after World War II was the design of a new military aircraft for initial pilot training, the S-11 Instructor. An aircraft trader already placed orders for 100 of these aircraft in 1946, before construction had even begun. The first prototype flew at Schiphol on 18 December 1947. During testing in early 1948 it was found that some aerodynamic changes had to be made to improve the handling of the aircraft. Later that year demonstration flights for several air forces followed and eventually many S-11s were sold to the Royal Netherlands Air Force, Israeli Air Force, Italian Air Force, Brazilian Air Force, Paraguayan Air Force and Bolivian Air Force. Some 170 aircraft were license built in Italy as the Macchi M.416. A limited number of S-11 Instructors are still flying today. The Dutch organization Fokker Four dedicated to the preservation of the aircraft operates four S-11s and amongst other activities still performs with them on airshows.

A version of the S-11 fitted with tricycle landing gear, the S-12, was built by Fokker Industria Aeronautica in Brazil, and was used by the Brazilian Air Force as the T-22 Instructor.

Operators

S-12 prototype in Dutch civilian markings

Brazil

Brazilian Air Force operated 100 aircraft in the 1960s and early 1970s.

Bolivia

Bolivian Air Force operated 8 aircraft in the 1970s.

Israel

Israeli Air Force operated 41 aircraft from 1951 to 1957.

Italy

Italian Air Force operated 178 aircraft built by Macchi under licence as Macchi M.416 from 1951 to 1960s^[1]

Netherlands

Paraguay

Paraguayan Air Arm operated 8 aircraft from 1972 to 1978.

Specifications (S-11)

Data from Jane's All The World's Aircraft 1953–54.^[2]

General characteristics

Crew: two/three
Length: 8.18 m (26 ft 8 in)
Wingspan: 11.0 m (36 ft 1 in)
Height: 2.22 m (7 ft 5 in)
Wing area: 18.5 m² (199 ft²)
Empty weight: 810 kg (1,784 lb)
Loaded weight: 1,100 kg (2,426 lb)
Powerplant: 1 × Lycoming O-435A, 142 kW (190 hp)

Performance

Maximum speed: 209 km/h (113 knots, 130 mph)
Cruise speed: 164 km/h (89 knots, 102 mph)
Range: 628 km (339 nmi, 390 mi^[3])
Service ceiling: 3,850 m (12,600 ft)
Climb to 1,000 m (3,300 ft): 5.6 min

References

↑ .aeroflight
↑ Bridgman 1953, pp. 169–170.
↑ Smith 1949, p.220.

Bridgeman, Leonard. Jane's All The World's Aircraft 1953–54. London: Jane's All The World's Aircraft Publishing Company, 1953.
Smith, Maurice A. "Fokker S.11 Instructor in the Air". Flight, 24 February 1949. pp. 218–221.

External links

Wikimedia Commons has media related to Fokker S-11.

Airliners.net - Photos of the Fokker S-11
Fokker Four website (currently in Dutch only)
Fokker S-11 pilot manual (Dutch)

Aircraft produced by Fokker

Company designations
pre-1918

M.1 M.2 M.3 M.4 M.5 M.6 M.7 M.8 M.9 M.10 M.14 M.15 M.16 M.17 M.18 M.19 M.21 M.22

V.1 V.2 V.3 V.4 V.5 V.6 V.7 V.8 V.9 V.10 V.11 V.12 V.13 V.14 V.16 V.17 V.18 V.20 V.21 V.22 V.23 V.24 V.25 V.26 V.27 V.28 V.29 V.30 V.31 V.33 V.34 V.35 V.36 V.37 V.38 V.39 V.40 V.41 V.43 V.45

Austro-Hungarian
military designations

German military
designations

A.I A.II A.III

C.I

D.I D.II D.III D.IV D.V D.VI D.VII D.VIII

Dr.I

E.I E.II E.III E.IV E.V

F.I

K.I

Company designations
post-1918

continuing
German military
designations:

B.I B.II B.IIII B.IV B.V

C.II C.III C.IV C.V C.VI C.VII C.VIII C.IX C.X C.XI C.XIV C.XV

D.IX D.X D.XI D.XII D.XIII D.XIV D.XVI D.XVII D.XXI D.XXIII

DC.I

F.II F.III F.IV F.V F.VI F.VII F.VIII F.IX F.X F.XI F.XII F.XIV F.XVIII F.XX F.XXII F.XXIV F.25 F26 F27 F28 F.29

FG.I FG.II FG.III FG.IV

G.I

S.I S.II S.III S.IV S.IX S-11 S-12 S-13 S-14

T.II T.III T.IV T.V T.VIII T.IX

based on
seating:

Fokker America

United States
military designations

Observation:	AO-1 CO-4 XO-27

Transports:	T-2 C-2 C-5 C-7 C-14 C-15 C-16 C-20 C-31 RA

Bombers:	XLB-2 XB-8 FT-1 FT-2

Attack:	XA-7

Fighters:	PW-5 PW-6 PW-7

Ambulance:	A-2

Trainer:	TW-4

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