Description

Landing gears are intended for static and dynamic loads transmission on AN-148/158 aircraft structural elements during parking, landing, takeoff, running and aircraft taxiing.

The design of the landing gears allows operating the aircraft both on concrete and dirt runways with the soil strength not lower than 12 kgf/cm2 under all weather conditions, depending on aircraft take-off weight.

The landing gears are manufactured according to the technical documentation of Antonov company.

 

Nose landing gear for AN-148/158

The front stanchion is a semilever type strut, which is set rack-and-pinion type steering gears.

The strut hangs on the bracket mounted on the walls of the nose landing gear.

The landing gear elements:

  • shock;
  • rack type steering gears;
  • unit and lever with the axis of the wheels.

 

Main landing gears for AN – 148/158

The main landing gear consists of:

  • traverse;
  • shock;
  • lever with the axis of the wheels.

All components are connected together pivotally and form a closed structure.

Liquid-gas shock absorber is made under the “rod down” scheme and is designed to absorb bumps and jolts of energy through the fluid flowing in the working volume of the shock through the throttle opening and the additional compression of nitrogen.

 

Folding strut of main landing gear for AN-148/158

Folding strut is designed for the perception of side efforts acting on the rack during start, run and taxiing.

The strut consists of:

  • upper level;
  • lower level.

The upper unit is hinged on the walls of the fuselage frames. The lower unit is attached to tide on the traverse pivotally through the spherical bearing.

 

Main landing gears thrust

The thrust has two sections mounted with a hydraulic cylinder and end switches.

This thrust is designed to fold strut when removing the main landing gear and fixation it in the extended position of the rack.

Specifications

Nose landing gear for AN-148/158 

Parameters Value
Type semilever mechanism
Type of  shock-absorber liquid-gas, two-chamber with the brake on the forward and  back moves
Shock gas industrial nitrogen
Shock fluid AMG-10 aicraft hydraulic oil
Charging pressure MPa (kg/cm2)

In the section 1

In the section 2

2,04 ± 0,05 (21 ± 0,5)

12,5 ± 0,2 (128 ± 2)

Steering fluid aviation oil NGZH-5u



Main landing gears for AN-148/158

Parameters Value
Type lever mechanism
Type of  shock-absorber liquid-gas, single-chamber with the brake on the forward and  back moves
Shock gas industrial nitrogen
Shock fluid AMG-10 aicraft hydraulic oil
Cylinder thrust fluid aviation oil NGZH-5u
Charging pressure MPa (kg/cm2) 4,41 ± 0,2 (45 ± 2)



Folding strut of main landing gear for AN-148/158

Parameters Value
The clearance between the units in the folding angle 29 º, mm no less than 3
Weight, kg 52,015 ± 0,780



Main landing gears thrust

Parameters Value
Distance between two points of attachment  in the straightened position, mm 540
Folding angle, degree no less that 135
Cylinder stripping reserve   in the straightened position of thrust(sag 4 ± 0,5), mm no less that 2,5
Cylinder stripping reserve  in folded position of a thrust, mm no less that 1,5
Cylinder stroke, mm 73
Weight, kg 8,990 ± 0,134