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The Use of Hydraulic Systems in Spacecraft

Hydraulic systems are simple, yet powerful devices that follow the basic principle of Pascal’s Law. Pascal was the scientist who first introduced the hydraulic system. He correlated pressure, force and area. Hydraulic systems are based on a closed area in which pressure is applied and it experiences force in all directions.

Pascal Law States That:

“Pressure increases uniformly across a contained fluid whenever one spot experiences a rise in pressure.”

Hydraulic systems are the best means to transfer force in fluids. This principle is only applicable in closed vessels. Mathemicaly, pascal law is:



P= Pressure.

F= Force.

A= Area.

Use of Hydraulic Systems in Spacecraft

Hydraulic systems play a crucial role in the functioning of spacecraft, providing a means of transmitting and controlling power for various applications. While hydraulic systems are more commonly associated with terrestrial machinery, they have specific uses and challenges when applied to the unique environment of space. 

In spacecraft, the most important elements are balance and smooth flight. For this purpose, it is necessary to have an equal force exerting in all directions. This is necessary for proper and smooth working of:

  • Wheel steering
  • Valve controls
  • Main landing gear and brakes
  • Engine gimbals
  • Payload deployment
  • Docking mechanisms and landing gear

Engineers must address the challenges of the space environment to design reliable and effective hydraulic systems for use in various space missions.

Other Applications of Hydraulic Systems in Different Fields

Hydraulic systems have many applications in different fields, including:

  • Positioning and clamping functions of vehicles
  • Amusement park rides
  • Harvesting/agricultural equipment
  • Engineering of steering and gears
  • Food industry/food manufacturing
  • Earth moving equipment and cranes

Positioning and Clamping Functions of Vehicles

Hydraulic systems play a large role in the automobile industry. It allows for exact placement and clamping by providing control and force. Hydraulic systems guarantee accuracy and control of movement in certain vehicle systems.

Amusement Park Rides

Hydraulic systems are essential components in amusement park rides, providing the power and control necessary for creating thrilling and enjoyable experiences while prioritizing rider safety. The versatility of hydraulic technology allows for a wide range of ride designs and movements in the dynamic world of amusement park attractions. They are commonly used for motion control, braking mechanisms, load balance, lifting and lowering, and ride control.


Agricultural equipment that employs hydraulic systems include:

  • Combines
  • Tractors
  • Loaders

They are also involved in the movement of other elements such as:

  • Cutting blades
  • Conveyors
  • Lifting mechanisms

 Without hydraulic systems, proper functioning of the above implements would not be possible.

Engineering of Steering and Gears

The steering and gears of vehicles follow Pascal’s principle. When you drive your car, you put force on the steering which delivers pressurized fluid. This, in turn, moves the steering mechanism. In this way, hydraulics help in the function of steering and gears. 

Earth Moving Equipment and Cranes

Hydraulic systems are widely employed in construction machinery for their ability to provide powerful and precise control over heavy equipment. These systems play a crucial role in various construction applications, enhancing the efficiency and functionality of machinery.

Food Industry

In the food Industry, mechanized equipment is used for 

  • Mixing
  • Grinding
  • Smoothening
  • Dyeing
  • Packaging

This equipment almost always uses hydraulic systems. Hydraulic cylinders allow the system to operate smoothly.  The cylinders produce pressurized fluid to provide torque (force). Sometimes, damage or wear and tear can cause serious issues in hydraulic systems. Here replacement hydraulic cylinders are required. We will explain this further in the next section.

Damage to Hydraulic Cylinders

If any damage occurs to a hydraulic cylinder, you need to find a replacement immediately.

Mostly, the damage occurs in the following parts of a hydraulic system:

  • Seals
  • Piston
  • Head glands
  • Bushings
  • Mounts

The common causes of damage in hydraulic systems include::

  • Air contamination
  • Water contamination
  • Temperature issues
  • System breaches
  • Improper installation
  • Collisions with other objects

Repairing or Replacing Hydraulic Cylinders

If any of the aforementioned damage occurs, you should not wait to replace or repair the damaged part. Replacing hydraulic cylinders is cost-effective and beneficial for the continued operation of the machine as a whole. When researching replacement cylinders, be sure to take proper measurements, including the diameter, bore, and stroke.You can ask for expert help in this regard, if needed.


Hydraulic systems play a crucial role in machinery across various industries due to their ability to transmit power efficiently and control the movement of components with precision. Their versatility makes them suitable for a wide range of applications across different industries (both on Earth and in space), contributing to the functionality, efficiency, and safety of various types of machinery.

IEMLabs is an ISO 27001:2013 and ISO 9001:2015 certified company, we are also a proud member of EC Council, NASSCOM, Data Security Council of India (DSCI), Indian Chamber of Commerce (ICC), U.S. Chamber of Commerce, and Confederation of Indian Industry (CII). The company was established in 2016 with a vision in mind to provide Cyber Security to the digital world and make them Hack Proof. The question is why are we suddenly talking about Cyber Security and all this stuff? With the development of technology, more and more companies are shifting their business to Digital World which is resulting in the increase in Cyber Crimes.


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