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AC Fuel Probes
Lightweight Graphite Composite
Product Overview
The LMS Composite Fuel Quantity Probes with AC Systems are made with lightweight and durable graphite composite. They are the lightest fuel probe available in the industry and virtually immune to cracking, dents or other field maltreatment. In fact, LMS has delivered over 6,200 graphite composite fuel quantity probes to the field, operating with no field failures in a wide variety of both commercial and military aircraft.
Graphite Composite Construction
The LMS Composite Fuel Probe weighs approximately half that of a similar metal probe. For example, a 38” long LMS composite probe now in production (with cable) weighs less than 10 ounces.
Electrical Connections
All electrical connections to the capacitance probe, from the interface connector to the actual probe tubes, make use of soldered or composite bonded electrical connections. There is no friction or riveted electrical connections on the LMS Composite Fuel Probe and all electrical terminations are sealed from the fuel environment.
Durability
Fatigue cracking of aluminum fuel probes, although infrequent, does occur around flood holes or riveted connections especially with a relatively long flange mounted cantilevered unit. The LMS Composite Probe with graphite composite tubing is inherently resistant to fatigue because the material does not “work harden” as aluminum does. Since the composite tubes are roughly half the weight of aluminum and are generally stiffer, the resonance amplitudes are significantly less.
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