Fokker S-11

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

S-11 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
Number built S-11 375
S-12 50
YT-22 1

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.

Variants
S-11
Prototypes - four built
S-11-1
Production variant for the Royal Netherlands Air Force and Navy - 48 built.
S-11-2
Production variant for the Israeli Air Force - 41 built.
S-11-3
Production variant for the Italian Air Force - 180 built under license by Aermacchi (Qty 110) and IMAM (Qty 70) as the M.416
S-11-4
Production variant for the Brazilian Air Force - 99 built including 95 by Fokker Brazil.
S-12
Tricycle landing gear variant, one prototype built by Fokker and 49 production aircraft for the Brazilian Air Force built by Fokker Brazil.
Macchi M.416
Name used for licence built S-11-3 for the Italian Air Force.
T-21
Brazilian Air Force designation for the S-11-4
T-22
Brazilian Air Force designation for the S-12
YT-22 Guanabara
Brazilian built four-seat tricycle landing gear variant, one built

Operators
S-12 prototype in Dutch civilian markings
 Brazil
 Bolivia
 Israel
 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 former Brazilian aircraft from 1972 to 1978.

Aircraft on display

Netherlands
S-11

Specifications (S-11)

Data from Jane's All The World's Aircraft 1953–54.[4]

General characteristics

  • Crew: 2
  • Length: 8.18 m (26 ft 10 in)
  • Wingspan: 11.0 m (36 ft 1 in)
  • Height: 2.22 m (7 ft 3 in)
  • Wing area: 18.5 m2 (199 sq ft)
  • Empty weight: 810 kg (1,786 lb)
  • Gross weight: 1,100 kg (2,425 lb)
  • Fuel capacity: 150 L (40 US gal; 33 imp gal)
  • Powerplant: 1 × Lycoming O-435A air-cooled flat-six engine, 140 kW (190 hp)

Performance

  • Maximum speed: 209 km/h (130 mph, 113 kn)
  • Cruise speed: 164 km/h (102 mph, 89 kn)
  • Range: 630 km (390 mi, 340 nmi) [5]
  • Service ceiling: 3,850 m (12,630 ft)
  • Time to altitude:
    • 5.6 min to 1,000 m (3,300 ft)
    • 25.4 min to 3,000 m (9,800 ft)

See also

Aircraft of comparable role, configuration, and era

References
  1. .aeroflight
  2. S-11 / E-22 Nationaal Militair Museum Retrieved: 14 October 2017.
  3. S-11 / E-24 Archived 2017-10-15 at the Wayback Machine Nationaal Militair Museum Retrieved: 14 October 2017.
  4. Bridgman 1953, pp. 169–170.
  5. Smith 1949, p.220.

Bibliography
  • Aloni, Shlomo. Stearman Replacement — Replaced by a Stearman. Air Enthusiast 87, May–June 2000, pp. 41–48. ISSN 0143-5450
  • 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.
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