AIRCRAFT OPERATING INSTRUCTIONS – VIRUS 912 S-LSA GLIDER
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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 undone before touchdown by applying rudder to align the aircraft’s
longitudinal axis with its direction of movement.
Parking
Come to a complete standstill by engaging brakes. Re-check RPM drop by switching ignition OFF and back
ON, one by one. Leave the engine running at idle RPM for a minute in order to cool it down. Set master
switch and ignition switches to OFF. Unlock air brakes (handle hanging down freely) and insert
parachute rescue system handle’s safety pin (if rescue system installed). Apply parking brake, if fitted.
Open cabin door, unfasten safety harnesses and exit the cockpit (watch for the wheel fairings!). Block the
wheels and secure the pitot tube by putting on a protection cover. Fit the tubes onto fuel tank vents so
that fuel will not spill onto the wing in event of full fuel tanks, temperature expansion of fuel and/or
parking on a slope. It is recommended to shut both fuel tank valves.
CAUTION!
Should the aircraft be parked on a slope it is recommended to shut one of the fuel valves to
prevent overflowing of the adjacent fuel tank.
8.6 Information on Stalls, Spins, and other useful pilot information.
Stall recovery
1.
First reduce angle of attack by pushing the control stick forward, then
2.
Add full power (throttle lever in full forward position)
3.
Resume horizontal flight.
Spin recovery
Virus 912 LSA is constructed in such manner that it is difficult to be flown into a spin, and even so, only at
aft center of gravity positions. However, once in a spin, intentionally or unintentionally, react as follows:
1
Set throttle to idle (lever in full back position).
2
Apply full rudder deflection in the direction opposite the spin.
3
Lower the nose towards the ground to build speed (stick forward).
4
As the aircraft stops spinning neutralize rudder deflection.
5
Slowly pull up and regain horizontal flight.
NOTE:
Virus 912 LSA tends to reestablish straight and level flight by itself usually after having spun for a
mere 45°-90°.
WARNING!
Keep the control stick centered along its lateral axis (no aileron deflections throughout the
recovery phase! Do not attempt to stop the aircraft from spinning using ailerons instead of rudder!
