Accession Number : AD0701759

Title :   ACCELERATED TESTING OF GENERAL AVIATION ENGINE EXHAUST SYSTEMS.

Descriptive Note : Final rept.,

Corporate Author : NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J

Personal Author(s) : Slusher,Gerald

Report Date : FEB 1970

Pagination or Media Count : 42

Abstract : An accelerated test procedure was developed for possible use to enhance and demonstrate the airworthiness of exhaust systems of single-engine aircraft incorporating exhaust gas-to-air heat exchangers. The exhaust systems of seven aircraft were endurance tested on engine stands to determine if the types and times of failures occurring during the tests were similar to failures occurring in aircraft and to identify design features for minimizing hazards. Evaluation of an exhaust system fabricated of a more corrosion-resistant material was included. Testing was conducted either until failure occurred or 600 test hours were accumulated. The accelerated test schedule and procedure produced failures comparable to those occurring in aircraft with 1 hour of testing equivalent on the average to 3.8 hours of operation in aircraft. It was concluded that the utilization of more corrosion-resistant, nickel-iron-chromium material would significantly reduce or eliminate those exhaust system failures resulting from high-temperature oxidation or corrosion, and that muffler failures and related carbon monoxide hazards could be minimized by the design and construction of airtight cabin ventilating systems in conjunction with the incorporation of muffler designs of the axial flow through type fabricated of a more corrosion-resistant material. (Author)

Descriptors :   (*AIRCRAFT ENGINES, *EXHAUST SYSTEMS), CAPTIVE TESTS, TEST METHODS, HEAT EXCHANGERS, EXHAUST GASES, FAILURE(MECHANICS), DESIGN, CORROSION INHIBITION, CHROMIUM ALLOYS, IRON ALLOYS, NICKEL ALLOYS, VENTILATION, ENGINE MUFFLERS

Subject Categories : Aircraft
      Reciprocating and Rotating Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE