RWD 16

The RWD-16 was a Polish two-seat low-wing sports plane of 1936, constructed by the RWD team, that remained a prototype.

Walter Mikron a RWD-16 (1936)
RWD-16
RWD-16 in its initial shape
Role Sports plane
National origin Poland
Manufacturer DWL
Designer RWD team
First flight 1936
Status prototype
Primary user Poland
Number built 1
Variants RWD-16bis

Development

The aircraft was designed in 1935 by Andrzej Anczutin of the RWD bureau, as a light and economical sports plane. The plane was a wooden low-wing monoplane, with two seats side-by-side in a closed cockpit, powered by 50 hp Walter Mikron I straight engine.[1]

The prototype was built and first flown in early 1936 (registration SP-AXY), funded by the Polish division of Osram factory. The plane did not appear a successful design, though. Test revealed lack of directional stability, therefore its rudder was much enlarged, the wings were fitted with fixed slats and a windshield was redesigned. It did not improve the situation much, and in 1937-1938 the prototype was rebuilt and fitted with stronger 60 hp Avia 3 engine in a lengthened nose, while the vertical stabilizer and rudder were made smaller. Most significant feature became a front windshield with a negative slope.[1]

After final changes, the prototype still was not satisfactory, but it served as a basis for the RWD-16bis design, which was a new, redesigned aircraft, produced as the RWD-21. The prototype RWD-16 was given then to a known touring aviator Zbigniew Babiński.[1]

Description

Wooden construction low-wing cantilever monoplane, conventional in layout, with a fixed landing gear and a closed cockpit. The fuselage was semi-monocoque, plywood-covered. Single-piece trapezoid wings with rounded tips, two-spar, plywood (in front) and canvas covered. Conventional cantilever empennage, plywood (fins) and canvas (elevators and rudder) covered. Two seats side-by-side, with twin controls, under a common canopy, with a fixed windshield. Conventional fixed landing gear with a rear skid.[1]

50 hp (37 kW) Walter Mikron I inline engine in front, with two-blade wooden propeller Szomański, 1.8 m diameter. In later variant, 60 hp (45 kW) Avia 3 inline engine was installed.

Specifications (RWD 16bis)

Data from Polish aircraft 1893-1939[2], Polskie konstrukcje lotnicze 1893–1939[3]

General characteristics

  • Crew: 1
  • Capacity: 1
  • Length: 7.8 m (25 ft 7 in)
  • Wingspan: 11 m (36 ft 1 in)
  • Height: 2.27 m (7 ft 5 in)
  • Wing area: 14.9 m2 (160 sq ft)
  • Airfoil: root: Warsaw Aerodynamic Institute 16%; tip: Warsaw Aerodynamic Institute 10%
  • Empty weight: 385 kg (849 lb)
  • Gross weight: 615 kg (1,356 lb)
  • Fuel capacity: 73 l (19 US gal; 16 imp gal) in a centre-section tank ; 7 l (1.8 US gal; 1.5 imp gal) oil
  • Powerplant: 1 × Avia 3 4-cylinder inverted air-cooled in-line piston engine, 45–48 kW (60–64 hp)
or Walter Mikron
  • Propellers: 2-bladed Szomański, 1.75 m (5 ft 9 in) diameter fixed-pitch wooden propeller

Performance

  • Maximum speed: 180 km/h (110 mph, 97 kn) at sea level
  • Cruise speed: 155 km/h (96 mph, 84 kn)
  • Landing speed: 70 km/h (43 mph; 38 kn)
  • Range: 700 km (430 mi, 380 nmi)
  • Service ceiling: 4,150 m (13,620 ft)
  • Time to altitude: 1,000 m (3,281 ft) in 6 minutes 30 seconds
  • Wing loading: 41.5 kg/m2 (8.5 lb/sq ft)
  • Power/mass: 0.0768 kW/kg (0.0467 hp/lb)

References
  1. Glass, A., op.cit., p. 322-323.
  2. Cynk, Jerzy B (1971). Polish aircraft 1893-1939. Putnam. pp. 556-561. ISBN 0-370-00085-4.
  3. Glass, Andrzej (1977). Polskie konstrukcje lotnicze 1893–1939 (in Polish). Warsaw: WKiŁ. pp. 322–323.
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