Washer SF 34

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Washer SF 34
Disc SF-34B dolphin
Type: Glider
Design country:

Germany Federal RepublicFederal Republic of Germany BR Germany

Manufacturer:

Scheiben-Flugzeugbau GmbH

First flight:

October 28, 1978

Number of pieces:

26 to 1987

The SF 34 (Delphin) disk is a two-seater glider in GRP construction for training, performance and simple aerobatics from the manufacturer Scheibe-Flugzeugbau, Dachau.

history

The SF 34 is the first glider manufactured in a modern plastic construction from the Scheibe company, which until then had relied on the simpler and easier-to-use composite construction for club operations. Against the competition of other plastic two-seaters such. B. ASK 21 or Twin Astir , the SF-34 was not granted any great commercial success, so production was discontinued in 1987. The French company Centrair manufactured licensed buildings under the name Centrair SNC-34 Alliance . The company Scheibe Aircraft, which also acquired the production rights for the Scheibe SF 25 Falke , has been offering the SF 34 Delphin again since 2010.

construction

The fuselage and wings are made of plastic, the GRP shell construction is used for the fuselage. A characteristic feature of an aircraft of this generation is the cross stabilizer , which is rarely used for an aircraft of this generation, all major competitors such as ASK 21, Twin Astir or Janus and the DG double-seaters rely on a T-stabilizer , the higher ground clearance of which promises advantages in an outlanding . The manufacturer argues here with higher resilience and weight savings compared to a T-tail. An essential safety feature is the standard equipment with automatic rudder connections. The seats are at the same height one behind the other in the cockpit, which is provided with a one-piece hood that can be folded away to the side, which enables a very good all-round view. Airbrakes based on the Schempp-Hirth system on the upper side of the wing serve as a landing aid . The SF 34 is equipped with both a bow and a center of gravity coupling. A permanently installed, spring-loaded central wheel as well as a nose wheel and a tail wheel at the stern serve as the chassis. The arrangement of the main wheel behind the center of gravity enables good ground handling.

Technical specifications

Parameter Data
crew 1-2
length 7.50 m
span 15.80 m
Wing area 14.80 m²
Wing extension 17th
Glide ratio 35 at 95 km / h
Slightest sinking 0.7 m / s at 75 km / h
Empty mass 340 kg
Max. Payload 200 kg
Max. Flight mass 540 kg
min. Wing loading 27.7 kg / m² (current production)
Max. Wing loading 36.5 kg / m²
Minimum speed 65 km / h
Top speed 250 km / h

See also

Web links

Commons : Disk SF_34  - Collection of images, videos and audio files