LANCAIR 360 — Systems Description

This document provides an overview of the hydraulic system used in the Lancair 320/360 aircraft, detailing its components, operation, and common issues. It explains the functionality of various parts such as the pump, valves, and circuits, as well as the hydraulic circuit's operation during gear retraction and extension.

• The Lancair 320/360 uses an Oildyne 108 series pump.
• The hydraulic system is simple but can be complex to diagnose if components are misconfigured.
• Key components include the poppet valve, spool, pressure relief valve, and thermal relief valve.
• The system features a back pressure circuit to manage fluid return.
• Normal operation involves fluid movement during gear retraction and extension.
• Emergency extension can occur using gravity in case of electrical failure.
• The pump cannot maintain pressure once shut down due to inherent leakage losses.
• Pressure switches control pump operation based on system pressure.