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  Aircraft History, Specification and Information
Scheibe SF-25 Falke
1970 Scheibe SF-25B Falke - HB-2010
1970 Scheibe SF-25B Falke - HB-2010 (sn 4692)
Photo taken May 29, 2004
Luzern-Beromunster Airfield- Switzerland - (LSZO)
Photo © Marcel Siegenthaler

The Scheibe SF-25 Falke (English: Falcon) is a German touring motor glider developed from the earlier Bergfalke glider by Scheibe Flugzeugbau. Since May 2006 the business has been run by Scheibe Aircraft GmbH.

Development

The company had produced the Motor Spatz but decided to produce a better light aircraft based on the Bergfalke glider. It had a new forward fuselage with an enclosed cockpit with two side-by-side seats and originally a Hirth F12A12C engine in the nose. It first flew May 1963 as the SF-25A Motor Falke. After an initial batch of aircraft the wing was lowered and it was renamed just the SF-25B Falke. A number of variants were built with various engines and the type was licenced built Sportavia-Pultzer, Aeronautica Umbra (Italy), Loravia (France) and Slingsby Aviation (United Kingdom). The current model is the SF 25C. It is currently available with a choice of three engines: the Rotax 912 80 hp, the Rotax 912S (100 hp) and the Rotax 914F3 (115 hp).

Scheibe SF-25C Rotax Falke - D-KIOZ
Scheibe SF-25C Rotax Falke
D-KIOZ
Photo taken Sep. 15, 2011
Winzeln-Schramberg Airport, Baden-Württemberg - Germany (EDTW)
Photo © Marcel Siegenthaler

Variants

  • SF-25A Motor Falke
    First production batch with a Hirth F12A12C engine, 56 built.
  • SF-25B Falke
    Improved variant with lower wing position and a 45hp Stark Stamo engine, 372 built.
  • SF-25C Falke
    Same as a SF-25B but with an alternator and electric starter. Sub-variants include:
    • Falke 1700
      49 kW (65 hp) Limbach 1700 EA 1 IA, driving propeller at 3,450 rpm;
    • Falke 2000
      60 kW (80 hp) Limbach 2000 EA, driving propeller at 3,450 rpm (about 512 Limbach powered Falkes built by 1998);
    • Rotax Falke
      60 kW (80 hp) Rotax 912 A running at 5,800 rpm and geared down to 2,500 rpm propeller speed; tricycle gear an option (about 130 Rotax powered Falkes built by 1998).
    • Falke 100PS
      Glider tug.
    • SF-25CS Falke
      A SF-25C with a feathering propeller; feathering was an option with the Falke 1700, 2000, and Rotax Falke.
  • SF-25D Falke
    SF-25B converted with a Limbach 1700A engine.
  • SF-25E Super Falke
    A SF-25CS with extended wing, a narrow-chord vertical tail. air brakes and a raised bubble canopy, first flown in 1974.
  • SF-25K K-Falke
    A SF-25C with folding wings and large canopy.
  • Slinsgby T61 Falke/Slingsby Venture
    Licence built variant of the SF-25B, 76 built

Specifications (Rotax Falke)

General characteristics
Crew: 2
Length: 7.60 m (24 ft 11 in)
Wingspan: 15.30 m (50 ft 2 in)
Height: 1.68 m (5 ft 6 in) tailwheel undercarriage
Wing area: 18.20 m2 (195.9 sq ft)
Empty weight: 435 kg (959 lb)
Max takeoff weight: 650 kg (1,433 lb)
Fuel capacity: 55 L (14.5 UG gal, 12.0 Imp gal) standard
Powerplant: 1 × Rotax 512 A flat-4, aircooled with water cooled cylinder heads, 48 kW (65 hp)
Propellers: 2-bladed

Performance
Maximum speed: 190 km/h (118 mph; 103 kn)
Cruising speed: 180 km/h (112 mph; 97 kn) maximun
Stall speed: 65 km/h (40 mph; 35 kn)
Range: 700 km (435 mi; 378 nmi)
Service ceiling: 4,580 m (15,026 ft) (more than)
Maximum glide ratio: 23-24
Rate of sink: 1.0 m/s (200 ft/min) minimum

Last updated May 17, 2012
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Scheibe Falke".
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