Schleicher ASW 12
This Open Class single-seater was designed by Gerhard Waibel - hence the 'W in its designation -as a production development of the Akaflieg Darmstadt D-36 Circe, in the design of which Waibel had also participated, and which had won the 1964 German National championships.
Of glassfibre reinforced plastic/balsa sandwich construction, the AS-W 12 has cantilever shoulder wings of high aspect ratio (25.8) and with full-span camber-changing flaps interconnected with the ailerons. There are no air brakes, and early examples lacked the later added (and at first non- jettisonable) tail chute. The monocoque fuselage is similar in outline to that of the D-36 Circe, and the pilot sits in a semi-reclining position under a long flush-fitting two-piece cockpit canopy. Landing gear consists of a large retractable unsprung monowheel with brake, plus a tailskid, and a small fixed-incidence tailplane and elevators are mounted on top of the fin.
The prototype AS-W 12 was built by Edgar Krȁmer, who made the first flight in it on 31 December 1965, and the type has since achieved a number of important competition victories and record-breaking flights. In 1969 W. Scott of the USA set a new world goal flight record of 600 miles in an AS-W 12, and in 1970 Hans-Werner Grosse of West Germany became one of the few pilots to make a flight of 1,000km (621 miles), also in an AS-W 12; on 25 April 1972 he set a world record for distance in a straight line by flying 907.7 miles. Grosse was also runner up in the Open Class of the 1970 World Championships at Marfa, Texas, in which five of the first nine places in this class were taken by AS-W 12s.
One example belongs to the National Soaring Museum.No. Built: 15
Wing span: 18.3 m / 60 ft 0.5 in
Length: 24 ft 1.5 in
Height: 5 ft 3.75 in
Wing area: 13 sq.m / 140 sq.ft
Aspect ratio: 25.8
Airfoil: Wortmann FX 62-131K mod.
Empty Weight: 290 kg / 640 lb
Payload: 140 kg / 308 lb
Gross Weight: 430 kg / 948 lb
Max speed: 124 mph
L/DMax: 47 at 105 kph / 56 kt / 65 mph
MinSink: 0.49 m/s / 1.6 fps / 0.95 kt at 45 mph
Wing Load: 33.06 kg/sq.m / 6.07 lb/sq.ft