Robinson R44 Raven I — Systems Description

This document is a Systems Description for the Robinson R44 II helicopter, detailing its various systems and components. It serves as a technical reference for pilots and maintenance personnel, providing essential information about the helicopter's structure, rotor systems, drive system, powerplant, flight controls, and more. The document outlines the materials used in construction, operational procedures, and maintenance guidelines to ensure safe and efficient operation of the aircraft. It is crucial for understanding the functionality and maintenance of the R44 II, which is a four-place, single main rotor, single-engine helicopter.

• The R44 II is a four-place helicopter with a welded steel and aluminum structure.
• It is powered by a Lycoming IO-540 engine, which is a six-cylinder, fuel-injected engine.
• The main rotor consists of two all-metal blades mounted on a hub with coning hinges.
• The drive system uses a vee-belt sheave to transmit power to the rotors.
• Flight controls include dual controls with a conventional operation system.