Key Applications of Tayco Engineering NSN Parts in Aircraft Systems

As a leader in specialized thermal and sensing solutions, Tayco Engineering, Inc. manufactures a variety of parts tailored for the challenging and, at times, inhospitable environments associated with aerospace and defense operations. For the benefit of procurement professionals, many such offerings are assigned a 13-digit National Stock Number (NSN), validating that they have met strict military and federal specifications regarding their form, function, and quality. Aside from pointing to their technical capabilities, this designation also standardizes identification and traceability for simplifying procurement activities carried out by the Department of Defense (DoD), NATO allies, and various agencies across the globe. To highlight how Tayco develops certified, high-performance solutions for demanding aviation applications, read on as we cover the purposes and designs of some of its most notable NSN-designated products.

Thermal Resistors

Thermal resistors are made with materials that exhibit a predictable shift in electrical resistance as temperature fluctuates. This simple mechanism allows thermal energy levels to be communicated via electrical signals, making such resistors very easy to implement into broader monitoring systems. Alongside sending signals that provide conditional alerts, they also act as active circuit-level components by automatically increasing their resistance as a system heats up to impede current flow. For the means of monitoring engine oil and fuel systems, environmental control systems (ECSs), and beyond, Tayco Engineering creates a range of specialized thermal resistors. As you seek out market options, some of the most sought-after resistors include:

• Part No. 62-3694-1, NSN 5905-01-295-2288: This is a high-accuracy sensing element designed to provide rapid response times to any step change in temperature, often taking less than 1 second for its process. As a result, these resistors are primarily found in the environmental control systems of commercial aircraft to help trigger automated heating or cooling cycles.
• Part No. 5-2262, NSN 5905-01-136-5410: This part number serves to identify a Tayco item that offers the ability to remain accurate sensing across temperatures ranging from -350°F to 500°F, remaining calibrated across many thermal cycles with its low-drift profile. This makes it a preferred choice for complex Circuit Board Assemblies (CCAs) and cockpit instrumentation, where false positive diagnostics or undetected overheating could have serious consequences.

Temperature Sensors

Tayco Engineering produces dedicated temperature sensors for liquids and gasses, meant to deliver continuous status updates on the conditions in hydraulic systems, engine oil lines, and liquid cooling loops to facilitate proactive mitigation of overheating conditions through pilot control or automated systems. For instance, part number 62-3596-501 with the NSN 5905-01-259-9278 is a notable example of such an offering, presenting traits like:

• Platinum Element Construction: This sensor utilizes a high-purity platinum resistive element to achieve stable readings across temperatures ranging from -100°F to 400°F, which is the industry standard.
• Vibration and Shock Resistance: Tayco sensors are regularly engineered to remain functional under significant mechanical stress, allowing this particular component to withstand mechanical shocks and random vibration levels of up to 20 Grms. As such, it is suitable for mounting directly on engine accessories or landing gear struts.
• Fast Thermal Response: This sensor is designed with a very low thermal mass value, meaning it requires little heat energy to change its own temperature. This is highly beneficial, as it allows the sensor to achieve a time constant of less than 2.0 seconds.
• Ruggedized Probe Housing: To protect the delicate sensing element from moisture and contaminants, this sensor is encased in a corrosion-resistant stainless steel housing.

Flexible Cable Assemblies

Aircraft designed and built in recent years are almost certain to use fly-by-wire technology and sophisticated sensor networks, both of which rely on wiring that delivers unwavering power and signals while accommodating the cramped or irregular spaces of an airframe. A standout example from Tayco is their printed flexible cable assembly that is marketed under part number 594-7557-3 and NSN 5995-01-139-2428. These cables offer a flatter, more space-saving alternative to traditional round-wire harnesses, with common benefits including:

• Mechanical Endurance: Engineered for dynamic environments, such as connecting sensors on moving control surfaces, these printed cables are rated to withstand over 1 million flex cycles without fatigue or breakage.
• Advanced Material Composition: These cable assemblies use a laminate construction of polyimide (Kapton®) and Fluorinated Ethylene Propylene (FEP) film to encase etched copper foil conductors, offering the dual benefit of great dielectric strength and ample resistance to chemicals.
• Environmental Resilience: This cable assembly is designed to operate across a temperature envelope of -65°F to 260°F for standard aerospace applications.
• Signal Integrity: Crosstalk and electromagnetic interference (EMI) from neighboring systems can corrupt data, but rather than adding the bulk of traditional braided wire shields, Tayco utilizes vacuum-deposited shielding where a thin layer of conductive material is applied directly to the polyimide substrate.

Turn to Aerospace Store for NSN-Designated Items from Tayco Engineering and Others

Regardless of part type, Tayco’s choice to have a variety of products approved under the NSN system means that the company’s solutions are positioned to fit the market’s need for interchangeable, reliable hardware that serves demanding aviation needs. If you are interested in securing Tayco Engineering NSN parts or components from other industry leaders like Pneumatic Products Corp and Hydraulic Accessories Co, we have you covered here on Aerospace Store.

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