Aircraft fluid lines are usually made of ________ or ________.

Aircraft fluid lines are typically constructed from metal tubing and flexible hose due to their specific properties and suitability for various applications. Metal tubing, often made of aluminum or stainless steel, provides structural integrity and resistance to external damage, making it ideal for high-pressure fluid systems. It can withstand the harsh operational environment of an aircraft, including temperature fluctuations and exposure to various fluids.

Flexible hose complements metal tubing by accommodating movement and vibration, which are common in aircraft. Flexible hoses are often reinforced and can handle pressure variations, making them a vital part of fluid transport systems like hydraulic lines or fuel lines where flexibility is crucial. This combination of rigid and flexible components allows for a reliable and durable fluid flow system tailored to the dynamic conditions an aircraft experiences.