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Coates Swalesong

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Swalesong
The Swalesong S.A.II at Bourn Airfield Cambridgeshire in 1982
Role Homebuilt monoplane
Designer James Ralph Coates
First flight 1973[1]
Retired 2007
Status Preserved
Primary user Private pilot owner

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

Development and operational history

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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.[2] It first flew on 2 September 1973,[2][1] powered by a 90 hp (67 kW) Continental PC60 Ground Power Unit converted to Continental C90 standard.[3] 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).[4]

Only one S.A.II G-AYDV and one simplified S.A.III were built. The Swalesong S.A.II survives at Breighton Airfield, East Yorkshire. The CAA G-INFO website shows that its registration is current in February 2021.

Variants

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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.[4]
Swalesong S.A.III
Simplified design for amateur construction, one built.[4]


Specifications (SAII)

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Data from Jane's All the World's Aircraft 1975–76[2]

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

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  1. ^ a b Ord-Hume 2013, p. 110
  2. ^ a b c Taylor 1975, p. 202
  3. ^ Jackson 1974, p. 382
  4. ^ a b c Taylor 1982, pp. 518–519
  • Jackson, A.J. (1974). British Civil Aircraft since 1919 Volume 2. London: Putnam. ISBN 0-370-10010-7.
  • Ord-Hume, A. W. J. G. (2013). British Private Aircraft 1946–1970: Volume 2. Petersfield: MMP Books. ISBN 978-83-61421-92-4.
  • 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.