TAIL SECTION
The tail section is a metallic semi-monocoque construction made with sheet,
beams and frames; it provides attachments for the tail rotor drive, the flight
controls, the tail rotor and the stabilizers (horizontal and vertical).
The tail section consists of a cone and a fin; subdivision is intended for
convention only. The tail section included the tail rotor drive fairings and the
leading and trailing edge of the vertical fin.
The structure of the fuselage is maintained ON CONDITION and reestablishment
is required only in case of damage. No overhaul is required
before a service life of 30 years or 25,000 flight hours.
Longerons, formers, bulkheads are made of aluminium alloy; the lateral skin
is made of aluminium honeycomb panels while the upper deck is made of
titanium.
The most important fuselage safety requirements include:
• in case of crash the deformations are controlled without jeopardizing
occupants escape
• natural frequencies are different from multiple frequency values of the
main rotor and tail rotor to minimize risk of vibrations
• the structure sustains lighting effects
• the fuselage is fireproof in fire critical areas, like center fuselage and
engine areas
• ground resonance effects are to be considered void
The structure of the tail section is maintained ON CONDITION and reestablishment
is required only in case of damage.