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The Scheibe SF 28 Tandem-Falke (English: "falcon") 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]

SF 28 Tandem-Falke
side view of a Tandem Falke
Role	Motorglider Type of aircraft
National origin	Germany
Manufacturer	Scheibe
Designer	Egon Scheibe
First flight	May 1971[1]
Number built	119 by 1985[1]
Developed from	Akaflieg München Mü13

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] At least one SF28 was used by the Spanish military as 'UE 16-1' and demobilized in April 2008.[3]

Specifications (SF 28A)

Data from Jane's all the world's aircraft, 1985-86[1]

General characteristics

• Crew: 1
• Capacity: 1
• Length: 8.1 m (26 ft 7 in)
• Wingspan: 16.3 m (53 ft 6 in)
• Height: 1.55 m (5 ft 1 in)
• Wing area: 18.5 m² (199 sq ft)
• Aspect ratio: 14.5
• Airfoil: Göttingen 533
• Empty weight: 410 kg (904 lb)
• Max takeoff weight: 610 kg (1,345 lb)
• Powerplant: 1 × Limbach SL 1700 4-cyl. air-cooled horizontally-opposed piston engine, 49 kW (66 hp)

Performance

• Maximum speed: 180 km/h (110 mph, 97 kn)
• Range: 520 km (320 mi, 280 nmi)
• Service ceiling: 5,000 m (16,000 ft)
• Maximum glide ratio: 26:1 at 85 km/h (46 kn; 53 mph)
• Rate of sink: 0.9 m/s (180 ft/min) at 69 km/h (37 kn; 43 mph)
• Wing loading: 32.99 kg/m² (6.76 lb/sq ft)

See also

Aircraft of comparable role, configuration, and era

• Fournier RF 5

Related lists

• List of motor gliders

Notes

References

Further reading

• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 595.

External links

• Picture of the Spanish UE 16-1 -

На других языках

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[de] Scheibe SF 28

Der Scheibe SF 28, besser bekannt unter dem Beinamen „Tandem-Falke“, ist ein zweisitziger, in Gemischtbauweise hergestellter Motorsegler, der ab 1971 von der Scheibe-Flugzeugbau GmbH aus dem Rumpf und Leitwerk des Bergfalken IV entwickelt wurde.

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- [en] Scheibe Tandem-Falke

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[fr] Scheibe SF 28

Le Scheibe SF 28 également connu sous son appellation Tandem-Falke est un motoplaneur ainsi qu'un motoplaneur d'entraînement développé par Scheibe Flugzeugbau.

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