Span
Area
Aspect ratio
Airfoil
Empty weight
Payload
Gross weight
Wing loading
Structure: |
15 m
113 sq. ft.
21.4
Wortmann FX-63-131-K
573 lbs.
584 lbs.
1157 lbs.
10.25 lbs./sq. ft.
fiberglass. |
L/D max
Min. sink |
43 @ 75 mph
1.93 fps @ 52 mph |
Designer
No. built
No. active in U.S |
Gerhard Waibel
1000
150 |
|
The AS-W 20 entered production in 1976 and was
an instant success, winning numerous world and national championships. Built for the
15-Meter Class, it features trailing edge flaps which interconnect with the ailerons and
allow the entire trailing edge to operate as a flap between -9
and +50. The flaps also act as ailerons, but deflect only half of the aileron amount. The
fuselage is identical to that of the AS-W19, but the elevator is shorter. Conventional
speed brakes are provided on the upper wing surface only. In 1983 production of the B
model began to take advantage developments in aerodynamics at Deift University,
Braunschweig University and elsewhere. Approximately 860 pneumatic jets are placed in the
lower wing surface, drawing impact air from pitot inlets and exhausting it into the
boundary layer to delay underwing flow separation. The B model has its gross weight
increased to 1165 pounds. Other changes include automatic elevator hookup, an instrument
cluster attached to the forward-hinged canopy, and a hydraulic disc brake. The L model has
detachable winglets. The AS-W 20 is among the most successful of the current 15-Meter
racers. |
