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Schleicher ASW 22

sch-asw22

 

Designed by Gerhard Waibel, the Open Class successor to the Schleicher ASW- 17, the ASW-22 first flew in 1981 with a 22 m wingspan, of which 39 were produced. It was also available with detachable wing tip extensions to give a span of 24m.
Span on the ASW- 22B model was increased to 25 m with a modified inner wing section and flaperons similar to the ASW-20. A 21 m span verison was to be offered with a higher maximum take-off weight for competition or record flights in rough weather.
 
It uses Horstmann and Quast airfoil technology with underwing pitot tubes to collect high-pressure ram air which then ejected through 860 tiny turbulator holes in the bottom wing skin ahead of the flap and aileron hinge line to delay separation of laminar flow on the lower surface and thereby reduce wing drag. Construction of the four-piece wing is primarily of carbon fiber, while the fuselage and horizontal stabilizer are combinations of fiberglass and Kevlar with some carbon. The wing is made in four sections. Up to 44 Imp gallons of water ballast can be carried.
 
Approach control is achieved using top surface double segment Schempp-Hirth airbrakes and a tail parachute. The ASW-22 is fitted with a two-mainwheel retractable undercarriage with oleo-pneumatic shock absorption and disc brakes; the tailwheel is retractable. Measured flight testing of the 25 m model by Dick Johnson demonstrated a best L/D of 56:1 at 47 kt.

 

An ASW- 22 flown by Hans Werner Grosse of Germany gained the world 750 km speed triangle record in 1985 at 158.41 kph/ 85.53 kt/ 98.43 mph. An ASW-22B won 1st and 2nd places in the Open Class at the 1987 World Championships at Benalla, Australa, another came 1st at the 1991 worlds at Uvalde, TX, and at the 1993 Worlds at Borlange Sweden, two came 1st and 2nd.

The ASW-22BE is a self-launching version with a mast mounted engine. Water ballast is reduced to 120 kg./ 264 lb.

The Schleicher ASW-22X experimental operated at 750kg with 24m span, whereas the original C of A allowed this weight only for ASW-22s of 22m span.

 

Span: 22m / 72 ft 2.25 in
Length: 26 ft 10.75 in
Height: 5 ft 9 in
Wing area: 244.1 sq ft
Aspect ratio: 22m
Empty weight: 882 lb
Max take-off weight: 1,543 lb
Best glide ratio: 55:1 (estimated)
 
Span: 24m / 78 ft 9 in
Length: 26 ft / 10.75 in
Height: 5 ft 9 in
Wing area: 251.0 sqft
Aspect ratio: 24.7
Max take-off weight: 1,543 lb
Best glide ratio: 55:1 (estimated)

 

ASW-22
Wing span: 25m / 82ft
Wing area: 16sq.m / 175.6sq.ft
Empty Weight: 450kg / 992lb
Payload: 300kg / 661lb
Gross Weight: 750kg / 1653lb
L/DMax: 60 95 kph / 51 kt / 59 mph
MinSink: 0.41 m/s / 1.35 fps / 0.80 kt  at 85 kph / 46 kt / 53 mph
Wing Load: 45.98kg/sq.m / 9.42lb/sq.ft
Water Ballast: 235kg / 518lb
Aspect ratio: 38.3
Airfoil: DLR-HQ 17
Seats: 1

ASW-22BE
Engine: 36 kW/ 48 bhp Rotax 505A
Wing span: 25m / 82ft
Wing area: 16sq.m / 175.6sq.ft
Empty Weight: 450kg / 992lb
Payload: 300kg / 661lb
Gross Weight: 750kg / 1653lb
L/DMax: 60 95 kph / 51 kt / 59 mph
MinSink: 0.44 m/s/ 1.44 fps/ 0.85 kt at 85 kph / 46 kt / 53 mph
Wing Load: 45.98kg/sq.m / 9.42lb/sq.ft
Water Ballast: 235kg / 518lb
Aspect ratio: 38.3
Airfoil: DLR-HQ 17
Seats: 1

 

 


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