In aircraft, springs have multiple uses. They are made from high-quality materials to withstand intense stress and are found in numerous parts like the landing gear, engines, seats, and controls. Springs, for instance, are vital for the functioning of the landing gear's retracting system. If a spring is not properly made, it could cause system failures. In engines, springs help to minimize vibrations. This article examines these uses and more, aiming to provide a clearer understanding of how springs contribute to aircraft systems.

Landing Gear

Aircraft landing gear employs springs to absorb shocks during take-off and landing. Their role mitigates direct impacts between the aircraft and the runway.

The spring's material and design determine its performance. Alloy steel is a common choice because of its resilience and durability. It withstands the substantial strain energy during landing, enabling controlled deceleration of the aircraft.

During an aircraft's landing, the alloy steel springs expand as the aircraft touches the runway. This expansion converts the kinetic energy of the moving aircraft into potential energy stored in the spring. The subsequent release of this energy causes a controlled deceleration that reduces structural pressure on the aircraft.

Springs in the landing gear require proper selection, consistent maintenance, and testing under various load conditions. The testing provides data useful for refining spring design and improving the reliability and safe operation of the aircraft.


Springs are located in the engine compartments of aircraft and perform a variety of different functions. They help hold engine parts in place and impact operational parameters.

Engine's valve mechanisms are one area where springs are needed. Springs control the opening and closing of valves at fast speeds in a repeated cycle. The accuracy of these movements controls the engine's air and fuel mixture, and timings for intake and exhaust, which in turn impact engine performance and emission levels. Therefore, a well-designed spring can optimize these parameters.

Use of springs is also seen in systems such as fuel injectors and turbine systems. Here, springs control fuel flow and air pressure. Yet, the design principles for springs for these systems are different from those for valve mechanisms. For example, a spring meant for a fuel injector should be able to control fuel flow precisely, whereas a spring used in a turbine system should be resistant to very high temperature. As a result, engineers must design specific springs for each application to ensure optimal performance.

It is evident that springs have multiple functions and design requirements in an aerospace context, highlighting the necessity for comprehensive understanding of springs and their applications.


Aircraft seats use springs to absorb shocks and vibrations during the flight, enhancing the comfort of passengers. These springs, often found in the backrests and seat cushions, operate by distributing body weight uniformly, thereby reducing pressure points. For instance, a coil spring located in a seat cushion compresses independently under the weight of a passenger, helping redistribute the load and alleviating pressure points.

Picking the correct spring for aircraft seats depends upon various factors. These include the capacity of the spring to carry load, its endurance to repetitive loading (fatigue life), its size corresponding to the seat design, and the degree of difficulty in incorporating the spring into the seat assembly. Depending upon these factors, certain springs may be more fitting for long-duration flights, while some may prove more appropriate for shorter flights. The process of selecting the suitable spring for aircraft seats necessitates careful evaluation since it directly impacts the overall journey's comfort level.


Aircraft parts such as control yokes, pedals, switches, and levers rely on springs for operation. These springs have to endure consistent use while maintaining their performance. Engineers should exhibit due diligence regarding two elements during the spring design: the spring's reactivity to pilot input and the durability of the spring.

The torsion springs in control yokes serve as a good illustration. The spring should allow deflection to the point where the pilot can accurately adjust the aircraft's orientation. Concurrently, the spring should be durable enough to operate over many flight hours without a considerable reduction in performance. A balance between these two aspects is influenced by the selection of spring material and the established load and rate factors. If a spring is too responsive, it could result in overreactions due to excessive deflection, while a spring that is too durable could negatively influence pilot control.

The balance between a spring’s reactivity and endurance is a factor in a smooth and safe flight. Springs are crucial in every flight control system - including elevators, ailerons, rudder pedals, control knobs - illustrating their vital role in the effective operation of these controls.


In essence, springs are integral to various airplane functions. They assist with improving landing experiences, enhancing engine performance, ensuring seat comfort, and supporting accurate control inputs. The value of these small components is significant to an aircraft's performance and safety. This highlights the need for careful design and selection of springs in the aviation industry. For instance, choosing the appropriate springs for landing gears directly influences the comfort of take-offs and landings. Therefore, the practical design and selection of springs is a major consideration for professionals within the aviation industry.