Landing Gear; Main Gear; Nose Gear; Brake System - Cirrus SR20 Pilot Operating Handbook

Cirrus Design
SR20

Landing Gear

Main Gear

The main landing gear are bolted to composite wing structure between the
wing spar and shear web. The landing gear struts are constructed of
composite material for fatigue resistance. The composite construction is
both rugged and maintenance free. The main wheels and wheel pants are
bolted to the struts.
Each main gear wheel has a 15 x 6.00 x 6 tire with an inner-tube installed
(Serials 2016 thru 2240 before SB2X-32-21), or with a tubeless tire
installed (Serials 2016 thru 2240 after SB2X-32-21, 2241 & subs).
Standard wheel pants are easily removable to provide access to tires and
brakes. Access plugs in the wheel pants can be removed to allow tire
inflation and pressure checking. Each main gear wheel is equipped with
an independent, hydraulically operated single cylinder, dual piston, disc
brake.

Nose Gear

The nose gear strut is of tubular steel construction and is attached to the
steel engine mount structure. The nose wheel is free castering and can
turn through an arc of approximately 170 degrees (85 degrees either side
of center).
Nose gear shock absorption is provided by polymer shock absorbing
pucks (Serials 2016 thru 2064), or an oleo strut (Serials 2065 & subs).
Steering is accomplished by differential application of individual main
gear brakes.
Each nosewheel has a 5.00 x 5 tire with an inner-tube installed (Serials
2016 thru 2240 before SB2X-32-21), or with a tubeless tire installed
(Serials 2016 thru 2240 after SB2X-32-21, 2241 & subs).

Brake System

The main wheels have hydraulically operated, single-disc type brakes,
individually activated by floor mounted toe pedals at both pilot stations. A
parking brake mechanism holds induced hydraulic pressure on the disc
brakes for parking. The brake system consists of a master cylinder for
each rudder pedal, a hydraulic fluid reservoir, a parking brake valve, a
single disc brake assembly on each main landing gear wheel, temperature
sensors, and associated hydraulic plumbing and wiring.
P/N 21399-004 P/N 21399-004
Revision A1
Airplane and Systems Description
Section 7
7-27 7-27