Abstract: The present disclosure provides for positive temperature coefficient (PTC) heater systems, assemblies and methods. More particularly, the present disclosure provides for PTC heater systems, assemblies and methods, with the PTC heaters having efficient heating traces for freeze protection applications (e.g., for aircraft/aerospace or the like). The present disclosure provides unique possibilities of heating patch nesting within heating areas for PTC heaters in order to achieve improved and/or efficient heating along with uniform power distribution. The PTC heater assemblies have a unique heater and/or heating pattern. The heating pattern of the patches of the heater assembly can be a combination/variety of shapes/designs, thereby ensuring that substantially each corner or the like of the heating area is printed with heater ink (PTC ink). Thus, the heater assembly efficiency is improved.

Abstract: Ice may form along the leading edge of an aircraft wing or horizontal and vertical stabilizers. A pneumatic deicer system may be configured to inflate and dislodge ice along the leading edge of lift and control surfaces. The pneumatic deicer system may comprise a laser welded deicing boot attached to the leading edge. The compressed air can be directed to the deicing boot, inflating the deicing boot along inflatable tubes formed by laser welds, which can crack and dislodge the ice. A method of manufacturing a laser welded pneumatic deicer boot is also disclosed.

Abstract: A stretch senor assembly may comprise a stretch sensor, a first housing and a second housing. The stretch sensor may include a first mounting end, a second mounting end, and a sensing region extending between the first mounting end and the second mounting end. The first housing may define a connector opening and the first mounting end may be located in the first housing. The second housing may be located around the second mounting end.

Abstract: A self-healing fabric for an inflatable of an evacuation system may comprise a fabric layer, an interior thermoplastic polymeric layer formed over a first side of the fabric layer, and an exterior thermoplastic polymeric layer formed over a second side of the fabric layer. The interior thermoplastic polymeric layer may include a first healing agent. The exterior thermoplastic polymeric layer may include a second healing agent.