Coates Swalesong

The Coates Swalesong is a 1970s British two-seat homebuilt monoplane.

Swalesong
The Swalesong S.A.II at Bourn Airfield Cambridgeshire in 1982
Role Homebuilt monoplane
Designer James Ralph Coates
First flight 1974
Retired 2007
Status Preserved
Primary user Private pilot owner

Development and operational history

The Swalesong S.A.II was designed and built by J. R. Coates. It is a low-wing wooden construction (spruce with plywood skin) cantilever monoplane with a fixed tricycle undercarriage, with pilot and passenger sitting side-by-side in an enclosed cockpit with a sliding canopy.[1] It first flew on 2 September 1973,[1] powered by a 90 hp (67 kW) Continental PC60 Ground Power Unit converted to Continental C90 standard.[2] A simplified version, the Swalesong S.A.III, was designed for homebuilding, which could be powered by engines of 85–108 hp (63–81 kW).[3]

Only one S.A.II G-AYDV and one simplified S.A.III were built. The Swalesong S.A.II survives in storage at Breighton Airfield, East Yorkshire. The CAA G-INFO website shows that its Certificate of Airworthiness expired on 8 August 2007.

Variants
Swalesong S.A.I
Designation of Luton Minor registration G-AMAW built by Jim Coates in the 1950s, not connected with S.A.II or S.A.III
Swalesong S.A.II
Prototype, one built.[3]
Swalesong S.A.III
Simplified design for amateur construction, one built.[3]


Specifications (SAII)

Data from Jane's All the World's Aircraft 1975–76[1]

General characteristics

  • Length: 19 ft 0 in (5.79 m)
  • Wingspan: 26 ft 5 in (8.05 m)
  • Height: 7 ft 3 in (2.21 m) (overall)
  • Wing area: 120 sq ft (11 m2)
  • Airfoil: NACA 23013.5
  • Empty weight: 730 lb (331 kg)
  • Max takeoff weight: 1,207 lb (547 kg)
  • Fuel capacity: 24 imp gal (29 US gal; 110 L)
  • Powerplant: 1 × Continental C90 air-cooled four-cylinder horizontally opposed engine, 90 hp (67 kW)
  • Propellers: wooden fixed-pitch-bladed, 5 ft 2 in (1.57 m) diameter

Performance

  • Maximum speed: 130 mph (210 km/h, 110 kn) at 1,000 ft (300 m)
  • Cruise speed: 95 mph (153 km/h, 83 kn) at 1,000 ft (300 m) (econ. cruise)
  • Stall speed: 49 mph (79 km/h, 43 kn) (flaps down)
  • Never exceed speed: 170 mph (270 km/h, 150 kn)
  • Range: 450 mi (720 km, 390 nmi)

References
  1. Taylor 1975, p. 202
  2. Jackson 1974, p. 382
  3. Taylor 1982, pp. 518–519
  • Jackson, A.J. (1974). British Civil Aircraft since 1919 Volume 2. London: Putnam. p. 382. ISBN 0-370-10010-7.
  • Taylor, John W. R., ed. (1975). Jane's All the World's Aircraft 1975–75. London: Jane's Yearbooks. ISBN 0-354-00521-9.
  • Taylor, John W. R., ed. (1982). Jane's All the World's Aircraft 1982–83. London: Jane's Yearbooks. ISBN 0-7106-0748-2.
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