Lesson 12: Aircraft Landing Gear

Shock Absorbers

• Steel Leaf or Tubular Spring

• Bungee Shock Cord

• Oleo Shock Strut

Steel Leaf or Tubular Spring

Steel Leaf or Tubular Spring

Bungee Shock Cord

Oleo Shock Strut

Oleo Shock Strut

Nose Wheel Steering And Shimmy Dampers

• Castering Nose Wheel

• Steerable Nose Wheels

Nose Wheel Steering And Shimmy Dampers

Landing Gear Retraction Systems

Landing Gear Retraction Systems

• Cessna 182 RG

• Hydraulically actuators powered by an electrically-driven hydraulic power pack.

• Normal operating pressure of 1000 PSI to 1500 PSI.

• Provides a positive up lock pressure on the main landing gear.

• Nose gear uses an over-center mechanical linkage.

Landing Gear Retraction Systems

• Cessna 182 Gear Warning Horn

• Based on the position of the throttle (power reduction to ~15 inches manifold pressure).

• Also requires the gear to be NOT down and locked (no green light).

• Not driven by speed.

• Not driven by altitude.

Aircraft Brakes

Wheel Units

• Energizing-type Drum Brake

• Weight of the vehicle or aircraft aids in the application of the brake.

Wheel Units

• Nonenergizing Brakes

• Expander Tube

• Disc Brakes

Disc Brakes

• Single Disc

• Most popular brake for modern light aircraft.

• Multiple Disc

Goodyear Single Disc (Keyed)

Brake Energizing Systems

• Diaphragm Type Master Cylinder

• Vented Master cylinders

• Boosted Brake Master Cylinders

• Power Brake System

Diaphragm Type Master Cylinder

Vented Master cylinders

Aircraft Wheels, Tires And Tubes

Wheels

• Single-piece

• Removable Rim

• Two-Piece

Tires

Tires

Normal Wear

Over-Inflation

Under-Inflation