NA-542 is a light five-seated
twin-engine helicopter. Its tail rotor has been substituted
by a proprietary patented system for complete compensation
of momentum (COCOMO).
Fuselage is manufactured
from carbon fibres, nomex & aluminium honeycombs and other
composite materials. The cockpit, power units and fuel tank
are based on a primary composite double curvature monocoque
sandwich structure, which is manufactured using high-temperature
vacuume production technology just like for other primary
and secondary composite parts.
Cockpit configuration is
equipped with analogue avionics for VFR flights and has dual
flight control systems. IFR and "glass cockpit"
versions will be developed at a later stage.
Standard HEMS stretcher fits into interior for HEMS missions.
The power unit consists
of two liquid cooled turbocharged rotary piston engines(Wankel
type) G-230TS-B1B - output 2x230 hp. A digital/analogue FADEC
computer continuously monitors and controls the unit.
Four fully-composite rotorblades
are fitted in three axes with elastomeric suspensions and
have a "safe when damaged"-design.
Helicopter's elastomeric rotorhead
is designed for maintenance-free service and its conception
is similar to the Starflex system.
Helicopter's tail section is equally
fully-composite including the stabilisation and compensation
The helicopter is equipped with a fixed-skids landing