Pipistrel Virus 912 User Manual

86
VIRUS
www.pipistrel.si
REV. 0
87
VIRUS
www.pipistrel.si
REV. 0
Appendix
As you start to move, pull ste stick 1/3 of elevator’s deection backwards to ease the pressure on
the nose wheel and lift it o the runway slightly. Do not use full back deection as this will cause
the aircraft’s tail to touch the ground.
When the nose wheel is lifted o the ground correctly, there is nothing else but to hold the same
angle of attack and the aircraft will become airborne. Crosswind take-os, depending on wind
strength, require a little bit of aileron deection into the wind. Remember, wings must stay level
thoughout ground-roll, rotation and initial climb!
Having lifted o the ground, gently push the stick forward just a bit to accelerate. At some 90 km/
h (50 kts) set aps to 1
st
stage, at 110 km/h (60 kts) set them to neutral.
Climb
A comfortable setting for climb is aps in neutral position, speed of 115 km/h (62 kts) at some 5000
RPM. In summer time or when outside temperature exceeds 30°C you should consider climbing at
some 130 km/h (70 kts) to provide more airow to the engine radiators. Trim the aircraft for comfort-
able stick forces.
Cruise
Passing through 140 km/h (75 kts), set aps to negative positon (handle full down). A confort-
able cruise setting is 25 InHg manifold pressure with 4500 engine RPM. Take advantage of the Vario
propeller to meat these settings. For those who do not have a manifold pressure gauge installed, set
engine to 5000 RPM at at pitch and then screw the propeller pitch knob to the right to meet 4500
RPM. Of course, cruising can be conducted at various power, propeller and ap settings.
As the Virus is sensitive to ap setting, ALWAYS use negative stage of aps beyond 150 km/h (80
kts) and neutral below 130 km/h (70 kts).
Cruising fast, do not kick-in rudder for turns! Above 160 km/h (85kts) the rudder becomes almost
insignicant in comparison to aileron deections when it comes to making a turn. Cruising fast, it
is extremely important to y coordinated (ball in the middle) as this increases eciency and de-
creases side-pressure onto vertical tail surfaces. Also, pay attention to turbulence. If you hit wake
turbulence, reduce power immediately and increase angle of attack to reduce speed. If necessary,
set aps to neutral position (below 130 km/h, 70 kts).
If ying a trac pattern, keep aps in neutral position and set engine power so that airspeed does
not exceed 150 km/h (80 kts).
Descent
Descending with the Virus is the stage of ight where perhaps most care must be taken. As the air-
craft is essencially a glider, it is very slippery and builds up speed very fast.
Start the descent by reducing throttle and setting propeller pitch back to at (screw propeller
pitch knob fully to the left). Do not, under any circumstances, increase speed or use airbrakes to
descend at high speeds.
If you have cruised at 200 km/h (105 kts) this is your top descent speed. During initial descent
I would recommend you trim for a 30 km/h (15 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.

Pipistrel Virus 912 Specifications

General

Brand	Pipistrel
Model	Virus 912
Category	Aircrafts
Language	English