The Applications of Potentiometers within Aircraft Systems

When it comes to handling volatile electricity within a circuit, there is often a need for measuring and managing current and voltage levels for the means of upholding safety and desirable performance levels. One way of achieving this is through the use of devices known as potentiometers, which are simply a form of variable resistor. With two terminals connected by a resistive element and a third attached to a wiper that moves across the material, the amount of resistance provided by the potentiometer can be adjusted simply by changing the position of the wiper. With a simple means of offering circuit management, potentiometers are prevalent in many industries and applications, such as modern aircraft. In this blog, we will specifically discuss the most common applications of potentiometers within aircraft systems, illustrating their importance in providing safety and functionality for many onboard electronics.

To begin our discussion, rotary potentiometers serve as one of the most recognized types used in supporting the operations of aircraft systems. These devices are named for their circular design, where the wiper moves in a rotary motion around a resistive element to cause changes to the electrical output signal. Rotational modification of settings is desirable for a number of basic applications, driving the use of rotary potentiometers within aircraft lighting fixtures where achieving exact levels of illumination is the goal. Additionally, various aircraft control panels within the cockpit may feature these devices for the means of managing lighting, volume levels of equipment, and much more. As illustrated, rotary potentiometers will generally be used in a situation where the user needs as much control as possible over a particular setting or process.

Linear potentiometers are another common type of potentiometer prevalent within aircraft electronics, differing from rotary designs in that their wiper moves along a straight path across the resistive material. In aircraft systems, these devices are often used to monitor the position of components such as control surfaces, landing gear, or throttle levers. For example, they can be integrated into systems that control the flaps or ailerons, providing real-time feedback on their exact position to ensure optimal aerodynamic performance. In many cases, these potentiometers will be mounted onto specific brackets. With bracket potentiometers implemented, flap and landing gear operations can be monitored and managed with high levels of accuracy.

Aside from such examples, rotary and linear potentiometers also find use in a number of other key areas of aircraft. For example, the voltage regulators of fuel systems heavily rely on these devices to ensure only the correct amount of fuel is delivered to engines during operations. Additionally, potentiometers can also be found in the electrical systems that power the aircraft's various instruments and control systems. In these cases, they help regulate voltage to ensure that the correct amount of power is delivered to critical components, avoiding any potential electrical overloads. As a last example of popular use, aircraft potentiometers are also necessary for the optimal functionality of avionics ranging from navigation to communication systems.

Speaking generally, while there are some performance differences between linear and rotary potentiometers, the choice between each is often quite nuanced. For example, rotary options pose space-saving benefits with a dial control in place of a larger, linear feature, as well as offer convenience for numerous forms of simple adjustments. Meanwhile, a linear potentiometer may be desirable for important changes like aircraft throttle control, where a pilot being able to make slow, precise adjustments by hand is necessary to not cause safety hazards. Alongside such examples, other factors may also play into the final decision, so there is not always a clear-cut answer as to which is best for what general application. Nevertheless, by taking into account all aspects of one’s needs, the particular requirements and characteristics of the aircraft system in question, and other such details, one should be able to narrow down the perfect fit with ease.

Ensuring that these components function correctly over time is vital. Over time, potentiometers may experience wear and tear as a result of various common stressors, such as vibration, heat, and pressure. Regular inspections should be carried out based on regulatory and manufacturer-recommended schedules to ensure any signs of damage or corrosion are identified and addressed as soon as possible. If any potentiometers are found to be faulty, they must be replaced before operation to guarantee safety.

For those seeking reliable and competitive options for aircraft potentiometers and other similar electronic devices, Rapid Parts Delivery is your one-stop shop with a comprehensive range of high-quality components ready for purchase today. As you peruse through our curated catalogs and come across desired items, be sure to make use of our online Request for Quote (RFQ) services for the means of obtaining tailored pricing options for your comparisons. With our team available around the clock, you can expect a response to any request shortly after we receive and review your form. You are also welcome to call or email directly, so never hesitate to kick off procurement for aircraft potentiometers and more!