(34C) Helicopter (Iriquois) Engine (T53 Lycoming) Performance

[SlideRule]

An extract from An Evaluation of Engine Performance Assessment Procedures for the Lycoming T53 Engine as Installed in the Iroquois Helicopter, Department of Defence (Australia), Defence Science & Technology Organisation, Aeronautical Research Laboratories (AR-00-281), ME Note 387, 1982

"1. INTRODUCTION
Since the introduction of the lroquois/Lycoming T53 helicopter into service with the US
Forces and its subsequent use by the RAAF, the aircraft and, in particular, its engine have been subject to an exhaustive series of regular in-service tests* to determine the installed power available and thus the aircraft performance capabilities.
…
2. INSTALLED ENGINE PERFORMANCE-RAAF IROQUOIS HELICOPTER
Currently the RAAF uses a combination of TIAC. SI-I 21. HIT and IFM checks to determine installed engine performance.
…
Once the card was complete, 10 consecutive readings, it was to be dispatched to the Early Failure Detection Cell (EFDC) at Fairbairn for data processing on an HP 25 calculator.
…
(a) The pilots should have access to a programmable electronic calculator with an enlarged and continuous memory-e.g. HP 34C.
…
TABLE A1
Lycoming T53 Inflight Monitoring Program Instructions for HP34C Calculator
…
TABLE A2
Lycoming T53-IFM-Program Listing-HP34C"
…

BEST!
SlideRule