Hydraulic System

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INTRODUCTION TO HYDRAULIC SYSTEM
The word “hydraulics” is based on the Greek word for water and originally meant the study of the physical behavior of water at rest and in motion. It is based on the fact that liquids are incompressible. Hydraulic system is a system where liquid under pressure is used to transmit energy and it is not new to aviation. Early aircraft had applied hydraulic brake systems. As aircraft became more sophisticated, the newer systems with hydraulic power were developed. Hydraulic systems in aircraft provide a means for the operation of aircraft components. The operation of landing gear, flaps, flight control surfaces, and brakes is largely accomplished with hydraulic power systems. Hydraulic pump used in the system will …show more content…

Power assisted brakes is where you will see this application the most in small experimental aircraft. Hydraulic systems have many advantages as power sources for operating various aircraft units as they combine the advantages of light weight, ease of installation, simplification of inspection, and minimum maintenance requirements. Hydraulic operations are also almost 100 percent efficient, with only negligible loss due to fluid friction. There are many devices in aircraft using the hydraulic systems such as gun turrets, auto pilot, shock absorption system, dive, landing, speed and flap brakes, bomb bay doors , doors and hatchways, landing gears, wing flaps.
HOW PASCAL’S LAW RELATED TO HYDRAULIC PRINCIPLE IN AIRCRAFT
Pascal's Law states that the "Pressure applied to any part of a confined fluid transmits to every other part with no loss. The pressure acts with equal force on all equal areas of the confining walls and perpendicular to the walls. This is the basic principle for any hydraulic system. In other words, if you have a fluid enclosed in a pipe (with no air bubbles) and change the pressure in the fluid at one end of the pipe, the pressure changes all throughout the pipe to …show more content…

However, the brakes used in aircraft are not same with the brakes used in car. Normal brakes, like in a car, only have one brake pedal which applies equal brake pressure to both wheels at the same time. So, normal brakes cannot be used to steer the aircraft. Differential brakes are applied to the aircraft brakes where the aircraft have two brake pedals. One for the left main wheel, and the other for the right main wheel. They work independently of each other and as a result, can be used to steer the aircraft by applying drag to the left wheel to make the aircraft turn left, as an

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