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The ASK 13 is a two-seater glider that was built by Alexander Schleicher. It was and still is widely used for ab-initio training of glider pilots.
Design and development
In 1965 Rudolf Kaiser continued development of the two-seat Ka 2 and Schleicher Ka 7 by introducing the ASK 13, using a mixture of materials including metal, wood and glassfibre. It has swept-forward single-spar wings, positioned lower than in the Ka 7, which allows for a large blown canopy providing a good all-round view for both pilots.
The 6 degree forward sweep of the wing allows the rear pilot to be seated near the centres of gravity and lift. The glider therefore maintains the same trim whether flown single seated or dual seated. The D-type leading edge torsion box is of plywood and the whole wing is fabric-covered. There are metal Schempp-Hirth air brakes above and below the wing, and the wooden ailerons are fabric-covered. The fuselage is a welded steel tube structure with spruce stringers and fabric-covered overall, except for the nose, which is glassfibre. The tail unit is plywood-covered, except for the rear part of the rudder and elevators, which are fabric-covered, and there is a Flettner trim tab in the starboard elevator.
Landing gear consists of a non-retractable sprung wheel, mounted aft of the centre of gravity. Originally there was a skid under the forward fuselage but many K13s now have a nose wheel. But a nose skid can still be seen on most k13s
It first flew in prototype form in July 1966 and by January 1978 a total of approximately 700 ASK 13s had been built by Schleicher. They are superb training gliders because they stall and spin well but these manoeuvres are easy to recover from. Their construction also gives them great strength and yet they are easily repairable.
The aircraft was succeeded by the ASK 21.
Specifications
General characteristics
Crew: 2
Length: 8.18 m (26 ft 10 in)
Wingspan: 16 m (52 ft 6 in)
Height: 1.6 m (5 ft 3 in)
Wing area: 17.5 m2 (188 sq ft)
Aspect ratio: 14.6:1
Airfoil: Gö 535/Gö 549
Empty weight: 295 kg (650 lb)
Max takeoff weight: 480 kg (1,058 lb)
Performance
Stall speed: 57 km/h (35 mph; 31 kn)
Never exceed speed: 200 km/h (124 mph; 108 kn) in smooth air
140 km/h (76 kn) in rough air
140 km/h (76 kn) on aero-tow
100 km/h (54 kn) on winch launch
g limits: +4.0 -2.0 at 140 km/h (76 kn)
Maximum glide ratio: 27 at 85 km/h (46 kn)
Rate of sink: 0.80 m/s (157 ft/min) at 68 km/h (37 kn)
Wing loading: 27.7 kg/m2 (5.7 lb/sq ft)
Link https://en.wikipedia.org/wiki/Schleicher_ASK_13
Link http://www.alexander-schleicher.de
————
Available Kits, RC Plans
1,6 meter (1:10 scale) ASK-13 from Dutch plans http://ask13.udjat.nl
2,13 meter (1:8 scale) ASK 13 from Dutch plans
http://www.rcgroups.com/forums/showthread.php?t=1712812 (modified by studioRS, Thompson)
Plans, laser cut wood short kits, both above 1,6m, 2,13m scale
http://www.scalesailplanekits.com/#!...tegory=5210197
————
2,73 meter ASK 13 Holz (1:5.6 Scale) Lenger Balsa/Ply/Glass
The ASK 13 - than the original best-known German sailplane trainer.
The semi-scale model is constructed in wood construction using balsa, plywood and pine and is suitable for slope and thermal alike. The canopy is made of Astralon. Ribs and bulkheads are CNC-milled. The fuselage sections are planked with 1.5-mm balsa and covered with fiberglass. Bernd King has a detailed construction manual, Part 1 and Part 2, written for the ASK 13th The example of our "photo model", the 1900-D is at the service of the German Alpine Gliding School Unterwössen, Germany.
Teil 1
Teil 2
http://www.lenger.de/cgi-bin/neu_web...d=4964043_7108
Nice photos of the 2,73 meter Holz Lenger AS K-13 kit aero towing
Bild 1 http://www.lenger.de/ASK13-Holz-Sturm_1.jpg
Bild 2 http://www.lenger.de/ASK13-Holz-Sturm_2.jpg
Bild 3 http://www.lenger.de/ASK13-Holz-Sturm_3.jpg
Bild 4 http://www.lenger.de/ASK13-Holz-Sturm_4.jpg
Bild 5 http://www.lenger.de/ASK13-Holz-Sturm_5.jpg
Bild 6 http://www.lenger.de/ASK13-Holz-Sturm_6.jpg
————
3,0 meter ASK-13 build from FLY magazine plans
————
3,2 meter ASK-13 Lenger ARF
http://www.lenger.de/cgi-bin/neu_web...d=4964043_7108
————
3,55 meters, 1:4,5 scale Fraes Fritz
http://www.1rb-org.net/fraesfritz/pl...cher_ask13.htm
————
4 meter, 1/4 scale, 147.6″ (3750mm) ASK 13 from Cliff Charlesworth plans
————
4 meter CNC-Bauteile
http://www.cnc-bauteile.eu/joomla/in...mid=70&lang=en
————
5,30m Scratch Build thread
http://www.rc-network.de/forum/showt...-ASK13-Projekt
————
5,33 meter Schneider-Modell
http://www.schneider-modell.at/ - fitted with Klapptriebwerk SLS/RMS
Video 1 http://www.rcmovie.de/video/432bab55...bwerk-533m-SpW
Video 2 http://www.rcmovie.de/video/68edd5c5...Klapptriebwerk
Erste Flug of 5,3 m Schneider-Modell ASK-13 video aerotowing http://www.youtube.com/watch?v=i6yYugGFJa4
Build Thread
http://www.rc-network.de/forum/showt...hneider-Modell
————
6,6 meter Nagel-Modellbau
Scale Documentation, Original Plans
Link http://www.scalesoaring.co.uk/VINTAG...mentation.html
Photographs
Link https://commons.wikimedia.org/wiki/F...SK-13_pic1.JPG
Link https://commons.wikimedia.org/wiki/F...SK-13_pic3.JPG
Link https://commons.wikimedia.org/wiki/F...SK-13_pic2.JPG
Link https://commons.wikimedia.org/wiki/F...0_hr_Start.jpg
The ASK 13 is a two-seater glider that was built by Alexander Schleicher. It was and still is widely used for ab-initio training of glider pilots.
Design and development
In 1965 Rudolf Kaiser continued development of the two-seat Ka 2 and Schleicher Ka 7 by introducing the ASK 13, using a mixture of materials including metal, wood and glassfibre. It has swept-forward single-spar wings, positioned lower than in the Ka 7, which allows for a large blown canopy providing a good all-round view for both pilots.
The 6 degree forward sweep of the wing allows the rear pilot to be seated near the centres of gravity and lift. The glider therefore maintains the same trim whether flown single seated or dual seated. The D-type leading edge torsion box is of plywood and the whole wing is fabric-covered. There are metal Schempp-Hirth air brakes above and below the wing, and the wooden ailerons are fabric-covered. The fuselage is a welded steel tube structure with spruce stringers and fabric-covered overall, except for the nose, which is glassfibre. The tail unit is plywood-covered, except for the rear part of the rudder and elevators, which are fabric-covered, and there is a Flettner trim tab in the starboard elevator.
Landing gear consists of a non-retractable sprung wheel, mounted aft of the centre of gravity. Originally there was a skid under the forward fuselage but many K13s now have a nose wheel. But a nose skid can still be seen on most k13s
It first flew in prototype form in July 1966 and by January 1978 a total of approximately 700 ASK 13s had been built by Schleicher. They are superb training gliders because they stall and spin well but these manoeuvres are easy to recover from. Their construction also gives them great strength and yet they are easily repairable.
The aircraft was succeeded by the ASK 21.
Specifications
General characteristics
Crew: 2
Length: 8.18 m (26 ft 10 in)
Wingspan: 16 m (52 ft 6 in)
Height: 1.6 m (5 ft 3 in)
Wing area: 17.5 m2 (188 sq ft)
Aspect ratio: 14.6:1
Airfoil: Gö 535/Gö 549
Empty weight: 295 kg (650 lb)
Max takeoff weight: 480 kg (1,058 lb)
Performance
Stall speed: 57 km/h (35 mph; 31 kn)
Never exceed speed: 200 km/h (124 mph; 108 kn) in smooth air
140 km/h (76 kn) in rough air
140 km/h (76 kn) on aero-tow
100 km/h (54 kn) on winch launch
g limits: +4.0 -2.0 at 140 km/h (76 kn)
Maximum glide ratio: 27 at 85 km/h (46 kn)
Rate of sink: 0.80 m/s (157 ft/min) at 68 km/h (37 kn)
Wing loading: 27.7 kg/m2 (5.7 lb/sq ft)
Link https://en.wikipedia.org/wiki/Schleicher_ASK_13
Link http://www.alexander-schleicher.de
————
Available Kits, RC Plans
1,6 meter (1:10 scale) ASK-13 from Dutch plans http://ask13.udjat.nl
2,13 meter (1:8 scale) ASK 13 from Dutch plans
http://www.rcgroups.com/forums/showthread.php?t=1712812 (modified by studioRS, Thompson)
Plans, laser cut wood short kits, both above 1,6m, 2,13m scale
http://www.scalesailplanekits.com/#!...tegory=5210197
————
2,73 meter ASK 13 Holz (1:5.6 Scale) Lenger Balsa/Ply/Glass
The ASK 13 - than the original best-known German sailplane trainer.
The semi-scale model is constructed in wood construction using balsa, plywood and pine and is suitable for slope and thermal alike. The canopy is made of Astralon. Ribs and bulkheads are CNC-milled. The fuselage sections are planked with 1.5-mm balsa and covered with fiberglass. Bernd King has a detailed construction manual, Part 1 and Part 2, written for the ASK 13th The example of our "photo model", the 1900-D is at the service of the German Alpine Gliding School Unterwössen, Germany.
Teil 1
Teil 2
http://www.lenger.de/cgi-bin/neu_web...d=4964043_7108
Nice photos of the 2,73 meter Holz Lenger AS K-13 kit aero towing
Bild 1 http://www.lenger.de/ASK13-Holz-Sturm_1.jpg
Bild 2 http://www.lenger.de/ASK13-Holz-Sturm_2.jpg
Bild 3 http://www.lenger.de/ASK13-Holz-Sturm_3.jpg
Bild 4 http://www.lenger.de/ASK13-Holz-Sturm_4.jpg
Bild 5 http://www.lenger.de/ASK13-Holz-Sturm_5.jpg
Bild 6 http://www.lenger.de/ASK13-Holz-Sturm_6.jpg
————
3,0 meter ASK-13 build from FLY magazine plans
————
3,2 meter ASK-13 Lenger ARF
http://www.lenger.de/cgi-bin/neu_web...d=4964043_7108
————
3,55 meters, 1:4,5 scale Fraes Fritz
http://www.1rb-org.net/fraesfritz/pl...cher_ask13.htm
————
4 meter, 1/4 scale, 147.6″ (3750mm) ASK 13 from Cliff Charlesworth plans
————
4 meter CNC-Bauteile
http://www.cnc-bauteile.eu/joomla/in...mid=70&lang=en
————
5,30m Scratch Build thread
http://www.rc-network.de/forum/showt...-ASK13-Projekt
————
5,33 meter Schneider-Modell
http://www.schneider-modell.at/ - fitted with Klapptriebwerk SLS/RMS
Video 1 http://www.rcmovie.de/video/432bab55...bwerk-533m-SpW
Video 2 http://www.rcmovie.de/video/68edd5c5...Klapptriebwerk
Erste Flug of 5,3 m Schneider-Modell ASK-13 video aerotowing http://www.youtube.com/watch?v=i6yYugGFJa4
Build Thread
http://www.rc-network.de/forum/showt...hneider-Modell
————
6,6 meter Nagel-Modellbau
Scale Documentation, Original Plans
Link http://www.scalesoaring.co.uk/VINTAG...mentation.html
Photographs
Link https://commons.wikimedia.org/wiki/F...SK-13_pic1.JPG
Link https://commons.wikimedia.org/wiki/F...SK-13_pic3.JPG
Link https://commons.wikimedia.org/wiki/F...SK-13_pic2.JPG
Link https://commons.wikimedia.org/wiki/F...0_hr_Start.jpg
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