Topic 5: Hydraulics and Pneumatics Hydraulics: use the force of a liquid in a confined space, such as an oil pipeline. Hydraulics apply apply two essential characteristics of fluids- their incompressibility and their ability to transmit pressure. Howstuffworks "A Hydraulic System“

Vocabulary Terms Hydraulic systems Pneumatic systems Valve Pumps

Pneumatic systems do not seal gas-usually air- in a mechanical system in the same way that hydraulic systems seal in hydraulic fluid. Air passes through the pneumatic device under high pressure and then escapes out the device. High pressure air may come from a machine that draws in outside air and compresses it.

Pneumatics at Work Jackhammer Pneumatic nailers Sandblasters

Riding on Air Used to transport people, cars, and equipment long distances over land or water. Use powerful pumps which draw in outside air and pump it out through holes in the bottom of the hovercraft. A skirt around the bottom holds enough air to support the weight of the craft above water or land. A hovercraft can support extremely heavy loads. Propellers drive the hovercraft forward, and rudders are used to steer it.

Homemade Hovercraft.. Video YouTube - The last hovercraft

Hydraulics at Work Backhoe Bulldozer Cherry picker

Hydraulics and Pneumatics in Your Body Your body’s respiratory system is more complex than any pneumatic machinery. This system is made of lungs; tubes that allow air to enter and leave the lungs; and muscles that cause your lungs to expand and contract.

Valves and Pumps Valve: used to control the fluid A valve is a movable part that controls the flow of fluid by opening and closing Valves can be made to operate automatically using the pressure that the valve is controlling Many pumps use automatic valves controlled by pressure to move fluids in a specific direction The valve is pushed open by pressure on one side and will close if the pressure becomes greater on the other side of the valve

YouTube - Pumps Your Blood