Schleicher ASW 20

from Wikipedia, the free encyclopedia
Schleicher ASW 20
ASW 20 in flight
Type: Glider
Design country:

Germany Federal RepublicFederal Republic of Germany BR Germany

Manufacturer:

Alexander Schleicher GmbH & Co

First flight:

January 27, 1977

Production time:

1977-1986

Number of pieces:

905

The Schleicher ASW 20 is a single-seat glider made of fiber-reinforced plastic for performance gliding . A total of 905 ASW 20s were built from 1977 to 1986, 100 of them under license from the French company Centrair. The Swede Göran Ax won the world championship in 1981 in Paderborn with an ASW 20, and numerous second and third places were won with her. There were five different versions, the glider index is 110-112.

history

In 1977, the FAI introduced a new competition class , the so-called "15 m class", which was the only restriction stipulating a span of no more than 15 m. The Schleicher ASW 20 is the first aircraft from the Alexander Schleicher company that was specially designed for this class. Later, due to small changes to the wing profile and a higher water ballast load, the versions B and C and, through additional attachable outer wings, which increase the span to 16.6 m, the versions BL and CL. In addition, the maximum downward deflection of the flaps has been reduced from the original 55 ° to 40 °.

construction

Gerhard Waibel designed the Schleicher ASW 20 (W for Waibel) in a middle-decker version with flaps , water ballast tanks and upward extending spoilers . The cockpit is designed for the greatest possible passive safety , in the event of an accident it absorbs a lot of energy and thus protects the pilot. The aircraft is made of fiber composite materials, glass, carbon and aramid fibers are used.

The flaps that deflect sharply downwards in the landing position and the additional spoilers enable slow and steep approaches - and thus safe landings even in short fields.

For cost reasons, the already tried and tested hull of the Schleicher ASW 19 was adopted for the hull, which was slightly modified for the rudder connections of the flaps. The T-tail unit has a fixed horizontal stabilizer , the rudder is automatically connected during assembly in later series and has a spring trim .

The landing gear consists of a wheel that can be retracted manually using a lever on the left side of the cockpit. The brake was initially a drum brake, later versions a hydraulically operated disc brake. Originally, the brake was operated with a brake lever on the control stick and later by coupling the spoiler handle with the brake. The tail unit is provided with a rubber grinding spur or a non-retractable spur wheel .

Jet engine as a retrofit kit

A jet engine on an ASW 20 CL

A retrofit kit for a homecoming aid in the form of a jet engine that can be folded out of the fuselage was developed for the ASW 20 . Instead of the conventional combustion engine with propeller , which was already offered previously, the approximately 12 kg jet engine serves as the drive to generate sufficient thrust for a climb , for example for an independent take-off, or to reduce the risk of an outlanding . The engine has a maximum range of around 240 km. The first prototype ASW 20 CL-J ( J stands for jet engine ) started on May 21, 2006, and the model has been ready for series production since the end of 2009 and is currently being tested in flight. A single-jet model was first presented to the general public at the ILA 2010 in Berlin.

Technical specifications

Parameter ASW 20 ASW 20 B ASW 20 C ASW 20 L ASW 20 BL ASW 20 CL
span 15 m 16.6 m
Hull length 6.82 m
Height at the tail 1.1 m
Wing area 10.5 m² 11.05 m² 11.013 m²
Elongation 21.43 24.94 25.02
Wortmann FX K131
and FX 60-126 		FX K131 and FX 60-126
underside modified 		FX K131
and FX 60-126 		FX K131 and FX 60-126
underside modified
Empty mass 260 kg 270 kg 265 kg 275 kg 265 kg
Max. Takeoff mass 454 kg 525 kg 454 kg 380 kg 430 kg 380 kg
Max. Wing loading 43.2 kg / m² 50.0 kg / m² 43.2 kg / m² 34.4 kg / m² 39.0 kg / m² 34.5 kg / m²
Max. Cockpit cargo 115 kg
Max. Water ballast 120 kg 150 kg 110 kg - 100 kg 50 kg
Top speed 265 km / h 280 km / h 265 km / h 250 km / h 265 km / h 250 km / h
Slightest sinking 0.59 m / s 0.55 m / s
Glide ratio 42 43 45 46
Manufacturing period 1977-1982 1983-1986 1977-1982 1983-1986
number of pieces 438 * 40 84 213 * 42 88

(*) including ASW 20F or ASW 20FL

See also

Web links

Commons : ASW 20  - collection of pictures, videos and audio files

Individual evidence

  1. ↑ Alexander Schleicher: All types of aircraft since 1951 , accessed on December 18, 2018.
  2. ↑ Detailed information at motorsegelfliegen.de. Archived from the original on August 17, 2011 ; accessed on March 24, 2020 .
  3. ↑ s. photos from bredow-web , accessed on January 9, 2011
  4. ↑ a b Specifications of the ASW 20/2 ASW L . Archived from the original on June 14, 2014. Retrieved April 21, 2014.
  5. ↑ a b Technical data of the ASW 20 B / ASW 2 BL . Archived from the original on June 14, 2014. Retrieved April 21, 2014.
  6. ↑ a b Technical data of the ASW 20 C / ASW 2 CL . Archived from the original on June 14, 2014. Retrieved April 21, 2014.
  7. ↑ Production list ASW 20 . Retrieved February 4, 2017.