Accession Number : AD0476214

Title :   CATAPULT RELIABILITY ANALYSES MODELS: TCE1 MOD 3, TCE1-FRG, AND CE1 MOD 3 (SERIAL NO. 7401),

Corporate Author : NAVAL AIR TEST FACILITY LAKEHURST NJ SHIP INSTALLATIONS

Personal Author(s) : Ivanovic, N. P.

Report Date : 24 DEC 1965

Pagination or Media Count : 42

Abstract : Reliability characteristics of the TCE1-FRG, TCE1 Mod 3, and CE1 Mod 3 catapults were determined and are presented as a function of both test program length and mission size. Dolly and cable operations had to be separated from the aircraft operations in order to more accurately determine catapult performance. Expressions are developed which permit the prediction of catapult reliability for any mix ratio of aircraft, cable, and dolly launchings. Valid reliability comparisons between different equipments can be made only if they are compared at the same service life point and at the same launch mix ratio. Significant reliability gains may be achieved by instituting a stringent preventive maintenance policy; however, whenever there is a lapse in this policy, the reliability level will drop to its base or inherent reliability level. Failure analysis indicates that most of the critical failures occurring on the CE catapults can be attributed to three subsystems, namely, the dolly, the arrester rope system, and the control system, all of which require additional development effort. There are strong indications that the dolly and arrester rope system, to which approximately 70% of the critical failures can be attributed, are velocity sensitive; that is, their failure rate increases with launching velocity. (Author)

Descriptors :   (*CATAPULTS, RELIABILITY), (*NAVAL AIRCRAFT, LAUNCHING), NUMERICAL ANALYSIS, RELIABILITY, FAILURE(MECHANICS), PERFORMANCE(ENGINEERING), TAKEOFF, CABLE ASSEMBLIES, SHIP STRUCTURAL COMPONENTS, CORDAGE, ARRESTING GEAR, DOLLIES, MECHANICAL PROPERTIES, NAVAL OPERATIONS, MATHEMATICAL PREDICTION, MAINTENANCE, NAVAL EQUIPMENT, CONTROL SYSTEMS.

Subject Categories : Terminal Flight Facilities
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE