Testing Composite Valve Covers for Reciprocating Engine Applications

Theuse of composites within the aeronautical field is not limited to airframeapplications and includes powerplant components in reciprocating engines. Toadd research body this area, presented work aimed evaluate theperformance novel carbon fiber valve covers installed on an aircraftreciprocating engine. Specifically, comparative performance between novelcomposite-based original steel was interest,with a focus thermal cooling behavior. The experimental proceduresimulated certification testing required for parts manufacturer approvalprovided by Federal Aviation Administration followed testprotocol outlined ASTM International. test engine run once with eachvalve cover type at multiple power settings, throughout which surfacetemperature recorded. In addition, fibervalve subjected post-run visual inspection identify theoverall condition thereof any potential damage introduced under engineoperating conditions. study revealed lower temperatures withaccompanying higher heating rates coverwhen compared cover. Moreover, sealing issues onthe were observed. high coupled withthe can have detrimental impact operation andlifetime, thus, equivalency requirements met. While carbonfiber did perform directly equivalent levels originalsteel cover, future improved isdemonstrated. Especially sustained, rapid coolingrate, weight savings associated use composite materials arepromising. results obtained be used further refine thedesign composite-based covers, ultimate goal meetingcertification applicational requirements.