Sinus 912 LSA Glider 550 MTOW
www.pipistrel.eu
REV. 3
Appendix
When the nose wheel has lifted off the ground, there is nothing else but to hold the same pitch
attitude and the aircraft will become airborne.
Crosswind take-offs, depending on wind strength,
require a little bit of aileron deflection into the wind.
Remember, wings must stay level throughout
ground-roll, rotation and initial climb!
Having lifted off the ground, gently push the stick forward just a bit to accelerate.
At some 90
km/h
(50 kts)
set flaps to 1
st
stage, at 110 km/h
(60 kts)
set them to neutral.
Climb
A comfortable setting for climb is flaps in neutral position, speed of 70 kts
(130 km/h)
at or slightly
below 5500 RPM. In summer time or
when outside temperature exceeds 30°C
you should
consider
climbing at some 85 kts
(160 km/h)
to provide more airflow to the engine radiators. Trim the aircraft
for comfortable stick forces.
Cruise
Passing through 85 kts
(160 km/h)
, set flaps to negative position (handle full down).
A comfort-
able cruise setting is 5300 engine RPM.
As the Sinus is sensitive to flap settings, especially when it
comes to fuel efficiency, ALWAYS use negative stage of flaps beyond 85 kts
(160 km/h)
and neutral
for level flight below 70 kts
(130 km/h)
.
Cruising fast, do not kick-in rudder for turns!
Above 85 kts
(160 km/h)
the rudder becomes almost
insignificant in comparison to aileron deflections when it comes to making a turn.
Cruising fast, it
is extremely important to fly coordinated (ball in the middle) as this increases efficiency and de-
creases side-pressure onto vertical tail surfaces. Also, pay attention to turbulence. If you hit tur-
bulence at speeds greater than VRA, reduce power immediately and pull the nose up to reduce
speed.
If flying a traffic pattern, keep flaps in neutral position and set engine power so that airspeed does
not exceed 150 km/h
(80 kts)
.
Descent
Descending with the Sinus is the stage of flight where the most care should be taken. As the aircraft
is essentially a glider, it is very slippery and builds up speed very fast.
Start the descent by reducing throttle and keep your speed below VRA.
During initial descent it is recommended you trim for a 10 kts lower speed than the one you decided
to descent at. Do this for safety. In case you hit turbulence simply release forward pressure on the
stick and the aircraft will slow down.
Also, keep in mind you need to begin your descent quite some time before destination.
A com-
fortable rate of descent is 500 fpm (2.5 m/s). So it takes you some 2 minutes for a 1000 ft (300 m)
drop. At 105 kts (200 km/h) this means 3.6 NM for each 1000 ft drop.
Entering the traffic pattern the aircraft must be slowing down.
In order to do this, hold your alti-
tude and reduce throttle to idle. When going below 80 kts (150 km/h), set flaps to neutral position.
Set proper engine RPM to maintain speed of 70 kts (130 km/h
)
. Trim the aircraft for comfortable stick
forces.
9-9
