Pipistrel Sinus 503 User Manual

36
SINUS motorglider
www.pipistrel.si
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37
SINUS motorglider
www.pipistrel.si
REV. 0
Normal procedures
Descent and nal approach
Reduce speed to 90 km/h (48 kts), set propeller to minimum pitch setting (screw propeller pitch
knob to the left fully) and set aps to 1
st
position.
Adjust engine power to maintain proper airspeed. Set trim to neutralise stick force if necessary.
During the descent monitor temperatures and keep them within operational limits.
CAUTION! When descending, make sure the propeller is set to minimum pitch!
CAUTION! During the descent engine power MUST be reduced. Should you be forced to
descend at idle power, make sure you keep adding throttle for short periods of time, not to turn
the sparks dirty.
CAUTION! With aps in 2
nd
position only half way aileron deections are permitted.
On nal, set aps to 2
nd
position.
Align with the runway and reduce power to idle.
Extend spoilers and maintain an airspeed of 90 km/h (48 kts).
Instead of throttle use spoilers to control your descent glide path.
CAUTION! Crosswind landings require higher nal approach speeds to ensure aircraft’s safe
manoeuvrability.
Roundout and touchdown
CAUTION! See chapter “Performance” for landing performance.
Roundout and touchdown (are) should be performed at following airspeeds:
Calm air, aircraft at MTOM 75 km/h (40 kts) IAS
Rough air, aircraft at MTOM (incl. strong crosswinds up to 28 km/h (15 kts)) 78 km/h (42 kts) IAS
CAUTION! Land the aircraft in such a manner that all three wheels touch the ground at
exactly the same time. When touching down, rudder MUST NOT be deected in any direction
(rudder pedals centred).
When on ground, start braking action holding the control stick in full back position. Stear the aircraft
using brakes and rudder only. Provided the runway length is sucient, come to a complete standstill
without engaging the brakes but holding the control stick slightly forward not to overstress the tail
wheel.
WARNING! After touchdown, DO NOT retract spoilers immediately, for this causes sudden
lift increase and the aircraft may rebound o the ground. Should this occur, hold the elevator
steady; under no circumstances attempt to follow aircraft’s movement with elevator deections,
for Sinus ultralight motorglider tends to attenuate rebounding by itself. However, it is important
to maintain runway heading using the rudder at all times. Retract spoilers only after the aircraft
has come to a complete standstill.
CAUTION! Should you be performing the touch-and-go manoeuvre, retract spoilers carefully
before re-applying full power.

Pipistrel Sinus 503 Specifications

General

Brand	Pipistrel
Model	Sinus 503
Category	Aircrafts
Language	English