|
| 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 |
107.6 |
220 |
485 |
140 |
308 |
450 |
992 |
45 |
9.2 |
140 |
308 |
| Aspect
ratio: |
22.5 |
| Airfoil: |
Wortmann FX 67-K-170/150 |
| Structure: |
wings and tail surfaces : glass-fiber reinforced plastic (GRP) sandwich with PVC core; carbon fiber spars. Fuselage: GRP monocoque structure reinforced with ribs of carbon fiber. |
| Engine: |
|
Comment:
The Pik-20 was designed as a 15 m. racing class,
all-fiberglass sailplane with water ballast,
retractable gear and 90 degrees trailing edge
flaps for landing. The B model added flap-
aileron interconnection and more water, which
could be retrofitted to earlier models. Carbon
fiber spars were optional on early B models, but
later became standard. Ingo Renner won the 15 m.
class at the 1976 World Championships at
Rayskala, Finland in a B-model, and others
finished 2nd, 3rd and 5th. The Pik-20D added
Schemmpp-Hirth air brakes and full-
span ﾑflaperonsﾒ which operate differentially
for roll control and deflect from ﾖ12 degrees to
+16 degrees for cruise or approach control. The ﾖ
20D features carbon fiber spar caps and carbon
reinforcement strips ar critical locations in
the fiberglass monocoque fuselage. On later
production models the nose profile was
sharpened, the tail moved 5 inches forward and
fuselage fairings recontoured to reduce drag.
The PIK-20E is a ﾖD sailplane with a retractable
Rotax two-cylinder two-cycle engine. A manual
crank handle requires about 15 turns to deploy
or retract the engine. |
|
