SUMMARY1. LOADS APPLIED ON THE HELICOPTER STRUCTURES.................................................................................2

2. HELICOPTER STRUCTURES FAILURE MODES.............................................................................................2

3. STRENGTH CRITERIA.................................................................................................................................2

1. INTRODUCTIONThis document establishes the structural design criteria that are take in account for the structural analysis of the helicopter.

2. LOADS APPLIED ON THE HELICOPTER STRUCTURESThe forces and moments acting upon the helicopter during its operative life induced on the helicopter structures internally and externally applied loads.

Are considered internally applied loads:

Engine operation loadso Torque loadso Centrifugal loads

Are considered externally applied loads:

FLIGHT LOADSo AERODYNAMIC LOADS

MAIN ROTOR: LIFT AND REACTION TORQUE TAIL ROTOR: THRUST AND REACTION TORQUE HORIZONTAL AND VERTICAL EMPENNAGES:LIFT AND DRAG

o MANEUVER INERTIAL LOADS

GROUND LOADSo LANDING GROUND LOADSo EMERGENCY LANDING LOADS

3. HELICOPTER STRUCTURES FAILURE MODES

4. STRENGTH CRITERIA

Inserire immagine

Inserire immagine