AEROPRAKT-22LS Pilot Operating Handbook
A22LS-POH-04
27
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 bronze bushings.
Landing gear data: wheel base
– 1.262 m (4 ft 2 in),
wheel track
– 1.712 m (5 ft 7 in),
min. turn radius ~ 2 m (7 ft).
Main wheels: size
– 6.00×6 or 8.00×6
pressure
– 1.6 bar (22.7 psi) for 6.00×6 wheels
– 1.3 bar (19.0 psi) for 8.00×6 wheels
Nose wheel: size
– 6.00×6 or 8.00×6 brakeless wheel
steering angle
– ±30°
pressure
– 1.0 bar (14.5 psi)
Each wheel may be fitted with a mud screen or a wheel spat (fairing) in case of 6.00×6
wheels installation.
8.4 Engine and its controls
This aircraft is equipped with a four-cylinder four-stroke Rotax-912UL (80 hp) or Rotax-
912ULS (100 hp) carburetor combined cooling engine produced by BRP-Rotax GmbH&Co
KG, Austria.
The engine is 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 Operators
Manual for Rotax
®
Engine Type 912 Series.
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
A-22LS can be equipped with any suitable propeller matching to Rotax-912 UL/ULS 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 (5'7") diameter.
