L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL
Do - L 23. 1012.5
4.Spin
The sailplane performs the spin without any tendency to enter a flat spin
at all operating centre of gravity positions. The sailplane has the
tendency to recover from the spin by itself, when at the maximum flight
weight and the forward centre of gravity. Entering the spin is entirely
conventional. Pull the control stick slowly back to approach the stall, use
the full deflection of the rudder at the stall speed of aproximately 32 KIAS
(Fig. 4-3) and maintain full aft deflection of the control stick. Initiate
recovery from the spin by applying full opposite deflection of the rudder.
When the sailplane stops the rotation, neutralize the rudder and
simultaneously ease the control stick forward. Recover the sailplane
from the dive in the usual way. The attitude during the spin is 60’ to
70’
nose down and the loss of height in one turn is aproximately 260 ft when
flying solo and 390 ft when flying dual. The time of one revolution of the
spin is approximately 3.5 secs.
Caution:
1.
Before spinning accomplish the procedures given in
the Flight Manual, Section 4, paragraph 3.
2.
IAS error.
The airspeed indications become erroneous at large
yaw angles, because the static vents on the sides of the
fuselage are by-passed asymetrically.
3.
When the spin is performed as an aerobatic manoeuvre,
it is possible to maintain the spin by applying aileron
in the direction of the rotation.
Stop the spin rotation by applying full opposite rudder
and neutralize the ailerons. When the sailplane stops
the rotation, neutralize the rudder and ease the control
stick forward. Pull-out from the dive using standard
procedure.
Note:
Airspeed indications well above the stall speed during a spin
may indicate a spiral dive rather than a spin.
( Cont. )
Appr.
Dec 1/93
4-19
