Schleicher ASW 17

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Schleicher ASW 17
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Type: Open class performance glider
Design country:

Germany Federal RepublicFederal Republic of Germany BR Germany

Manufacturer:

Alexander Schleicher GmbH & Co.

First flight:

17th July 1971

Production time:

February 1972 - 1976

Number of pieces:

55

The Schleicher ASW 17 is a glider designed by Gerhard Waibel for the German manufacturer Schleicher GmbH & Co. for performance flight in the open class .

history

The ASW 17 can be seen as a further development of the ASW 12 . However, the ASW 17 should be suitable for series production, while the ASW 12 (usually with 18.20 m span) was only built as a one-off production with individual small changes. In four years, only 15 copies of the ASW 12 were produced, with which, in addition to many world records over 1000 km, some international glider championships could be won.

During the series production of the ASW 17, experience with the GRP standard machine ASW 15 was also incorporated, from which, for example, the tube core construction for the fuselage was adopted.

construction

The ASW 17 is a GRP high-performance glider designed as a cantilevered shoulder wing. The double trapezoidal wing is designed in four parts and has an integrated flap-aileron system over the entire span with six external and clad drives. Interestingly, the ASW 17 uses the same flap profile (Wortmann FX-62-K-131 (mod.)) That was already used on its ancestor, the D-36, and its predecessor, the ASW 12. The wing nose is designed to hold 2 × 50 liters of water ballast.

The fuselage is designed as a GRP tube core sandwich shell fuselage. There are two tow couplings on the underside of the fuselage. The cockpit canopy is one-piece and removable. The machine has a retractable unicycle undercarriage and an aerodynamically shaped grinding spur.

The strikingly pointed trunk is based on research by the Brazilian mathematician Francesco Galvao. According to his formula, three-dimensional profiles could be calculated from two-dimensional NACA profiles . Also very characteristic are the conventional horizontal stabilizer used for the last time in a plastic construction from Schleicher, as well as the high and relatively steeply inclined vertical stabilizer.

Technical specifications

Parameter Data
crew 1
length 7.55 m
span 20 m
height 1.86 m
Wing area 14.84 m²
Wing extension 27
Glide ratio 48 at 100 km / h
Slightest sinking 0.50 m / s
payload 115 kg
Empty weight 395-405 kg
All-up weight 570-610 kg
Top speed 240–250 km / h regardless of
the weather conditions
Minimum speed 68 km / h

See also

literature

  • Dieter Schmitt: Test-ASW 17th Flight Review November 1972, p. 50 ff.

Web links