AEROPRAKT-22LS Pilot Operating Handbook
A22LS-POH-04
24
8.3 Landing gear
Airplane landing gear is of tricycle type with steerable nose wheel. The main LG is of the
cantilever spring type. The main LG leg is a spring machined of a round aluminum bar. It is
attached to the lower boom of the frame No. 3 at two points: upper and lower supports.
The support brackets are machined of aluminum alloy. The main LG wheels are fitted with
hydraulic disk brakes.
The nose LG leg is steerable, of trailing link type. The steering is ensured using the rudder
pedals via pushrods, connecting the left and right side pedals with bellcrank on the strut.
The leg consists of a strut and a trailing link in form of nose wheel fork. The trailing link is
connected to the strut with a spring shock absorber/damper.
The nose leg is attached to the frame No. 1 at 2 points
–
on upper and lower supports. The
upper support is made of 4 mm aluminum alloy sheet and the lower one is build-up. The
supports are fitted with brass bearings.
Each wheel is fitted with a wheel spat (fairing) or mud screens (in case of the low-profile
tires and 6.00×6 wheels).
Landing gear data: wheel base
–
1.71 m (5 ft. 7 in),
wheel track
–
1.26 m (4 ft. 2 in),
min. turn radius ~ 2 m (7 ft.).
Main wheels: size
–
5.00×5 or 6.00×6
pressure
–
1.6 bar (22.7 psi)
Nose wheel: size
–
5.00×5 or 6.00×6 brakeless wheel
steering angle
–
±30°
pressure
–
1.6 bar (22.7 psi)
8.4 Engine and its controls
This aircraft is equipped with a four-cylinder four-stroke Rotax-912iS (100 hp) combined
cooling engine produced by BRP-Powertrain GmbH&Co KG. (Austria).
The engine is has the flat-four layout, dry sump lubrication system with a separate oil tank
of 3 l (0.8 US gal) capacity, automatic valve clearance adjustment, two carburetors,
mechanical membrane fuel pump, double electronic ignition system, integrated water
pump, electrical starter, integrated gearbox of 2.43 reduction ratio.
All engine systems (fuel, electrical, cooling) are assembled in accordance with Rotax-912
engine operation manual.
The engine is fitted with an air intake pre-heater box designed by Aeroprakt, which
improves engine operating conditions, preventing carburetor icing in cold weather and
increasing the engine output in hot weather.
8.5 Propeller
This aircraft is equipped with KoolProp three-blade on-ground adjustable propeller of 1.9 m
(73 in) diameter.
A-22LS can be equipped with any suitable propeller matching to Rotax-912iS engine
power output and the airplane speed range. One of the optional propellers is KievProp
three-blade on-ground adjustable propeller of 1.7 m (67 in. > 71 in.) diameter.
