|
| Span |
Area |
Empty Weight |
Payload |
Gross Weight |
Wing Load |
Water Ballast |
| m |
ft |
sq.m |
sq.ft |
kg |
lb. |
kg |
lb. |
kg |
lb. |
kg
/sq.m |
lb.
/sq.ft |
kg |
lb. |
| 15 |
49.2 |
10.49 |
113 |
260 |
573 |
265 |
584 |
525 |
1157 |
50 |
10.25 |
160 |
352 |
| Aspect
ratio: |
21.4 |
| Airfoil: |
Wortmann FX- 63-131-K |
| Structure: |
fiberglass |
| Engine: |
|
Comment:
The ASW-20 first flew in 1977 and was an instant
success, winning numerous world and national
championships. Built for the 15 m. racing class,
it features trailing edge flaps which
interconnect with the ailerons and allow the
entire trailing edge to operate as a flap
between ﾖ9 and +5 degrees. The flaps also act as
ailerons, but deflect only half of the aileron
amount. The fuselage is similar to that of the
ASW-19. Schempp-Hirth type airbrakes are provided
on the upper wing surface only and operate in
conjunction with the flaps at approach setting.
The ﾖ20B model was introduced in 1983
incorporating new aerodynamic developments in the
form of pneumatic (ﾑturbulatorﾒ) jets (about 860)
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 525 kg./ 1,157 lb. Other changes
include automatic elevator hookup, an instrument
cluster attached to the forward-hinged canopy,
and a hydraulic disc brake. The ﾖ20C model has a
slightly modified cockpit, an maximum gross
weight of 454 kg./ 1,001 lb and water ballast of
120 kg./ 264 lb. Schleicher also introduced
an ﾑLﾒ variant, with span extended to 16.59 m. by
use of detachable tip extensions, making the ASW-
20L, -20BL and 20CL. In these, water ballast is
restricted to 50 kg./ 110 lb. And gross weight is
430 kg./ 948 lb (BL) and 380 kg. / 837 lb and no
ballast (CL). With the extended tips, best glide
ratio goes up to about 46. The ASW-20 was also
license built by Centrair in France in three
variants. The ASW-20F and ASW-20FL are the
Centrair equivalents to the 20 B and 20BL model
while the 20 FP is an F model with NASA winglets
designed to improve performance in weak
conditions. Roy Mcmaster, Karl Striedeck and John
Seymour won jointly, with others, the world
triangle distance record of 1,435 km./ 891.6
miles in 1994 in an ASW-20B. ASW-20ﾒs won 2nd and
3rd places in the 15 m. class at the 1983 World
Championships at Hobbs, NM. Specifications are
for the B model. |
|
