Disc SF 26

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Disc SF 26
f2
Type: Glider
Design country:

Germany Federal RepublicFederal Republic of Germany BR Germany

Manufacturer:

Scheiben-Flugzeugbau GmbH

First flight:

1961

Number of pieces:

about 60

The disc SF 26 "Standard" is a single-seat glider from the Scheibe-Flugzeugbau GmbH from Dachau , which made its first flight in 1961. As the additional designation "Standard" suggests, the SF 26 was intended as a 15 m standard class performance glider and as a competitor to the successful Schleicher Ka 6 .

description

The SF 26 is similar externally, apart from the more angular and higher vertical tail , the L-Spatz III because, as the Mountain Hawks II / 55 and III Bergfalke the GRP -Nasenverkleidung of the trunk and the canopy of the L-Spatz 55 were used. The body structure is also similar to that of the sparrows with the typical hexagonal cross-section with the triangular steel tube support and the three wooden moldings attached. However, the SF 26 has a permanently installed impeller and a spur roller instead of the runner. The floor plan of the tailplane also corresponds to that of the sparrows.

The big difference is the three-part double trapezoidal wing of the SF 26. This is equipped with a NACA laminar profile wing. The distance between the ribs was only 100 mm in order to ensure that the profile was adhered to better.

The middle section of the wing with the Schempp-Hirth flaps that extend up and down on both sides is placed on the fuselage from above and connected. Only then are the two outer wing parts with the ailerons installed.

About 60 SF 26 were built before it was replaced by the SF 27 disc . For its part, the excellent SF 27 came too late to be able to hold its own against the emerging plastic construction.

Technical specifications

Parameter Data SF 26A "Standard"
crew 1
length 6.70 m
span 15 m
height
Wing area 12.34 m²
Wing extension 18.25
Wing profile NACA 63-215-616 inside
NACA 63-215-614 outside
Glide ratio 30 at 80 km / h
Slightest sinking 0.70 m / s at 70 km / h
Empty mass 183 kg
Max. Takeoff mass 330 kg
Top speed 200 km / h

See also

literature

  • Gerd Zipper: Falkenhorst. The history of the disk planes . Weishaupt, 1999, ISBN 3-7059-0059-5 .

Web links