ASAP Aerospace Hub Blog

Spring plungers are a type of hardware that offers a simple and effective way of positioning parts so that they fit perfectly within an assembly. Consisting of a spring and a ball, they apply pressure to the parts with which they are used, essentially pushing the ball or nose to ensure that the adjacent part is properly positioned. To further assure a perfect fit, eccentric bushings are often employed alongside spring plungers.

For a typical aircraft to lift off from the ground and achieve flight, it must expend a massive amount of energy. While aircraft engines are advanced systems that harness the combustion of fuel to create thrust, the engines are not the only things aircraft have that utilize power. There are also many electronic systems and other devices, ranging from the lights that illuminate the cabin to the instruments that provide pilots with readings on flight conditions. To ensure that everything on and across the aircraft has the power needed to function as intended, most aircraft feature a special component known as an auxiliary power unit (APU). As a common fixture of many modern aircraft, it can be very useful to have a general understanding of their functionality and use.