How the Airbus H135 Main Transmission Works

Airbus H135 main transmission showing the gearbox that transfers power from the two engines to the main rotor, Fenestron and accessory systems.

Two engines, one main rotor, one Fenestron, hydraulic pumps and oil-cooling fans all need mechanical power. Sitting at the centre of this arrangement is one of the most important components on the H135: the main transmission. It does considerably more than simply reduce engine speed. The main rotor drive transmits power from both engines to […]

Inside the Airbus H135 Bearingless Main Rotor

Airbus H135 four-bladed bearingless main rotor system showing the composite rotor blades and rotor head.

Look at the rotor head of many conventional helicopters and you will find a complex collection of hinges, bearings and mechanical joints that allow each rotor blade to move as it rotates. Look at an Airbus H135 and the arrangement is strikingly different. The H135 uses a four-bladed, bearingless and hingeless main rotor system. Instead […]

Embraer E170/E190 Temperature Control System: Optimising Cabin Comfort

A comfortable cabin environment significantly enhances passenger satisfaction and crew efficiency during flight. The Embraer E170/E190 Temperature Control System is precisely engineered to maintain ideal conditions in both the cockpit and passenger cabin, ensuring consistent comfort throughout every flight phase. By integrating dual-zone temperature controls, sophisticated sensors, and automated modulation valves, the system reliably delivers […]

AUTOPILOT FLIGHT DIRECTOR SYSTEM ON THE BOEING 757

A Legacy of Precision: The Evolution of Autopilot Systems Autopilot systems have come a long way since their origins in the early 20th century. Early designs could only maintain heading or altitude using gyroscopic feedback. As aviation evolved, so did the complexity of these systems—incorporating pitch, roll, yaw control, and eventually becoming integrated with navigation […]

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