Technical description

NA-542 CTS is a light five-seated twin-engine compound helicopter. Its tail rotor has been substituted by a proprietary patented system for complete compensation of momentum (COCOMO) and is equipped with Tail Fan System for better efficiency during horizontal flight.

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 turboshaft engines TS-100 - output 2x220 kW. 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, compensation elements and Tail Fan System.

The helicopter is equipped with a fixed-skids landing gear.

EXPECTED CATEGORY
Normal VFR, IFR
Operational JAR Ops 3, Category A, Performance Class 1, 2

EXPECTED CERTIFICATION
Helicopter JAR 27
Noise JAR 36
Power unit JAR 33
Emission JAR 34

Safety is improved by elimination of tail rotor hazards.

Helicopter is friendly to the Environment due to very quiet operations (flyover at 500 feet AGL = 72,5 dbA).