Aircraft engine cycle logging unit

Details Aircraft engine cycle logging unit Aircraft engine cycle logging unit

1994-07-20

1996-09-03

Park, Collin W.

Boots, shoes, and leggings

36442404, 364569, 340971, G06F 1740

Patent

active

055529879

ABSTRACT:
A maintenance interval indication system, apparatus and method are provided that are cost-effective for general aviation aircraft and that may be retrofitted to existing airplanes. The system includes an on-board aircraft cycle counter and engine run-time and flight time logging instrument that requires no external transducers, no electrical signal inputs and only a single electrical power input from an airframe's electrical system. A microprocessor in the engine cycle logger accepts data input from an acoustic transducer and from a pressure transducer (i.e., altimeter), and correctly logs engine cycles in spite of factors such as: a) touch-and-go landings; b) in-flight engine shutdowns; c) noise from another engine on the same aircraft: d) wide variations in acoustic input levels from one engine to the next; e) changes in acoustic level following an overhaul of the monitored engine; f) transient noise artifacts; and g) transient altitude artifacts. Data from the cycle logging unit are communicated to a portable data collection device for subsequent off-board processing.

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patent: 5023791 (1991-06-01), Herzberg et al.
patent: 5033010 (1991-07-01), Lawrence et al.
patent: 5053967 (1991-10-01), Clavelloux et al.
patent: 5060156 (1991-10-01), Vajgart et al.

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