Scheibe Tandem-Falke

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The Scheibe SF 28 Tandem-Falke (German: "hawk") is a German motorglider that was designed by Egon Scheibe in 1970 and which flew for the first time in May the following year.^[1] It was a development of the Scheibe Falke with (as its name suggests) seating in tandem rather than side-by-side as in the original Falke design.^[1]^[2]

Development

The SF 28 is a low-wing, cantilever monoplane of conventional design with a large perspex canopy. The undercarriage consists of a non-retractable monowheel and a steerable tailwheel, linked to the rudder.^[2] Small outrigger wheels are fitted to nylon legs under each wing.^[1]^[2] The fuselage is of steel tube construction, covered in fabric^[1] and the wings are constructed of wood and fabric around a single spar.^[2]

Operational history

Scheibe entered at least one Tandem-Falke in the German Motor Glider Competition of 1977.^[2]

Specifications (SF 28A)

Data from Taylor, J.W.R. (1985), p.740

General characteristics

Crew: two
Length: 8.10 m (26 ft 7 in)
Wingspan: 16.30 m (53 ft 6 in)
Height: 1.55 m (5 ft 1 in)
Wing area: 18.5 m² (199 ft²)
Aspect ratio: 14.5
Wing profile: Göttingen 533
Empty weight: 410 kg (904 lb)
Gross weight: 610 kg (1,345 lb)
Powerplant: 1 × Limbach SL 1700, 49 kW (65 hp)

Performance

Maximum speed: 180 km/h (112 mph)
Range: 520 km (323 miles)
Service ceiling: 5,000 m (16,400 ft)
Maximum glide ratio: 26
Rate of sink: 0.90 m/s (177 ft/min)

Notes

↑ 1.0 1.1 1.2 1.3 1.4 1.5 Taylor, J.W.R. (1985), p.740
↑ 2.0 2.1 2.2 2.3 2.4 Coates 1978, p.70

References

Wikimedia Commons has media related to Scheibe SF 28.

Coates, Andrew (1978). Jane's World Sailplanes and Motor Gliders. London: MacDonald and Jane's. p. 67.
Taylor, John W. R. (1985). Jane's All the World's Aircraft 1985–86. London: Jane's Yearbooks. p. 740.
Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 595.

v t e Aircraft designed and built by Scheibe

Unpowered	Mu-131 Bergfalke Spatz Specht Sperber Zugvogel SF-26 SF-27 Scheibe SF-30 Club-Spatz SF-34

Powered	SF-23 Sperling SF-24 Motorspatz SF-25 Falke SF-27M SF-28 Tandem-Falke SF-29 SF-32 SF-33 SF-35 SF-36 SF-40

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