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Schleicher ASW 17

sch-asw-17
 
Also known as the Super Orchidee, this Open Class high performance single-seater was designed by Dipl-lng Gerhard Waibel as a development of the AS-W 12. It was the second of Waibel’s Open Class designs.
 
Superseding the ASW-12, it is a shoulder wing monoplane with a 90 metre wingspan which is in four sections, only 4.5 inches deep at the root. It has a fibreglass span skin, while the fuselage is monocoque two-skin glass fibre sandwichof a special plastic hexcell monocoque. It is dominated by the large dorsal fin and rudder, which is over 6 ft high, which is sculptured from a 6 inch diameter fuse­lage where the empennage (conventional low-set tailplane and elevator) emerges. The mainplanes have full length four-position flap/ ailerons which give a variable wing geometry of from +9 deg to –11 deg.
 
The modified Wortmann wing section is thicker than the AS-W 12's to enable water ballast to be carried in wing tanks. Built in the wings forward of the spar are rubberised ballast tanks with a capacity of 95 litres / 100 kg / 220 lb. For penetration, this load can be dumped in 1 min 50 secs. The aluminum double segment dive brakes in both the upper and lower surfaces are effect­ive to the extent that the tail parachute used in the prototype is no longer a stand­ard item. The single, retractable sprung mono landing wheel is a large 500 x 15, with considerable ground clearance. The wheel brake is operated by a T-bar alongside the left leg. Cockpit space is ample and lengthy, and a pilot up to 6 ft 6 ins can be accommodated quite easilyin a semi-reclining seat under a flush-fitting one-piece canopy. Controls are conventional. Ventilation is drawn from the fuselage near the trailing edge. Visibility is excellent, comfort good, and all control reaches are very good.
 

Sch-ASW-17-01

 
It first flew in prototype form on 17 July 1971 and 52 AS-W 17s had been built by January 1977; production has now ceased.
The AS-W 17 soon made its mark in competition flying, coming second in the Open Class in the 1972 World Championflown by Hans-Werner Grosse of Germany, and winning the 1976 World Championships, held in Finland, for Britain flown by George Lee; this was the first British victory since 1952. The AS-W 17 has made some notable long distance flights, inlcuding a world record goal flight of 765.4 miles by Hans-Werner Grosse on 16 April 1974; he also set a triangular distance record of 660.5 miles (1,063km) in Australia in an AS-W 17 on 18 January 1977, this flight also breaking the speed record for a 1,000km triangular closed circuit at 61.2mph. An ASW-17 flown by Hans Werner Grosse of Germany gained the World record 1,000 km speed triangle at 145.33 kph/ 78.5 kt/ 90 mph and the 1,250 speed triangle at 133.24 kph/ 71.9 kt/ 82.8 mph in 1980.
 
ASW-17
Wing span: 20m / 65 ft 7.5 in
Wing area: 14.86 sq.m / 159.8 sq.ft
Wing section Wortmann FX-62-K-131 (modified)
Aspect ratio: 27
Length: 24 ft 9.25 in / 7.55 m
Height: 6 ft 1.25 in / 1.86 m
Empty Weight: 404 kg / 890 lb
Payload: 166 kg / 367 lb
Gross Weight: 570 kg / 1257 lb
Water ballast: 100 kg / 220 lb
Max airspeed: 130 kt / 149 mph / 240 km/h (in smooth air)
Rough air speed: 130 kt / 240 km/h
Stall: 37 kt / 68 km/h
L/DMax: 100 kph / 54 kt / 62 mph at 42 kt
MinSink: 0.50 m/s / 1.64 fps / 0.97 kt at 46.5 mph / 40.5 kt / 75 km/h
Best glide ratio: 48.5:1 at 65 mph / 56.5 kt / 105 km/h
Wing Load: 38.36kg/sq.m / 7.8lb/sq.ft
Water ballast: 220 lb
Seats: 1
 

Sch-ASW-17-02

 
 
 
 
 
 


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