Stall Recovery; Spin Recovery; Engine Failure During Takeoff - Pipistrel Sinus 503 Flight And Maintenance Manual

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SINUS motorglider
Emergency procedures
REV. 0
Introduction
This chapter provides information on how to react when confronted with typical flight hazards.

Stall recovery

First reduce angle of attack by easing-off on the control stick, then
1. Add full power (throttle lever in full forward position).
2. Resume horizontal flight.

Spin recovery

Sinus ultalight motorglider is constructed in such manner that it is difficult to be flown into a spin.
However, once spinning, 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 neutralise rudder deflection.
5. Slowly pull up and regain horizontal flight.
Sinus ultralight motorglider tends re-establish rightened flight by itself usually after having spinned
for a mere 90°.
WARNING!
throughout the recovery phase! Do not attempt to stop the aircraft from spinning using ailerons
instead of rudder!
WARNING!
using gentle stick movements (pull), rather than overstressing the aircraft.
However, VNE must not be exceeded during this manoeuvre.
When the aircraft is rightened and flies horizontally, add throttle and resume normal flight.
Engine failure

Engine failure during takeoff

Ensure proper airspeed by reducing angle of attack and land the aircraft in runway heading,
avoiding eventual obstacles in your way.
Shut both fuel valves and set master switch to OFF position (key full left).
WARNING!
After having landed safely, ensure protection of aircraft and vacate the runway as soon as possi-
ble to keep the runway clear for arriving and departing traffic.
Keep the control stick centred along its lateral axis (no aileron deflections
After having stopped spinning, recovering from the dive must be performed
DO NOT CHANGE COURSE OR MAKE TURNS IF THIS IS NOT OF VITAL NECESSITY!
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