Pipistrel Virus 912 S-LSA Glider, Operating Instructions Manual

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AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER
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When on ground, start braking action holding the control stick in full back position. Steer the
aircraft using brakes and rudder only. Provided the runway length is sufficient, come to a
complete standstill without engaging the brakes holding the control stick slightly backwards as
you decelerate.
WARNING! After touchdown, DO NOT retract airbrakes immediately, as this causes sudden lift
increase and the aircraft may rebound off the ground. Should this occur, hold the elevator
steady; under no circumstances attempt to follow aircraft’s movement with elevator movements,
for Virus 912 LSA tends to stabilize rebounding by itself. However, it is important to maintain run-
way heading using the rudder at all times. Retract air brakes only after the aircraft has come to a
complete standstill.
CAUTION! Should you be performing the touch-and-go maneuver, retract air brakes care-fully
before re-applying full power.
Crosswind approach and roundout
CAUTION! Crosswinds prolong landing runway length due to elevated airspeed that should be
used, see previous page.
Performing a crosswind landing, the wing-low method should be used. When using the wing-low
method it is necessary to gradually increase the deflection of the rudder and aileron to maintain
the proper amount of drift correction.
WARNING! If the crab method of drift correction has been used throughout the final approach
and roundout, the crab must be recovered the before touchdown by applying rudder to align the
aircraft’s longitudinal axis with its direction of movement.
8.2.4 Engine extraction and retraction. N/A
8.2.5 Best Rate of Climb Speed. V
Y
= 70 kts; V
X
= 52 kts . Speeds greater than 70 kts
may be preferable on warm days as rate of climb remains strong at speeds beyond 90 kts.
8.2.6 In-Flight Starting the Engine . V
ES
is the Maximum velocity for engine restart in
flight 50 kts. This is applicable only for the auto-feathering propeller version! Do not restart the
engine in flight beyond this speed.
NOTE: This procedure applies only for stopping and restarting the engine following an
intentional unpowered flight. Reduce speed to 50 kts or below. Apply normal engine shut down
or start-up procedure. Upon restart, should the engine cool down during unpowered flight, apply
choke. Always start the engine at idle throttle.
CAUTION! Do not add full power while the engine is still cool. Fly at lower airspeeds at low power
engine setting to warm it up instead (e.g. 50 kts (90 km/h) at 3000 RPM).
8.2.7 In Flight Shutdown of Engine . This procedure applies only for stopping and
restarting the engine following an intentional unpowered flight. Reduce speed to 50 kts or