EVALUATION OF HELICOPTER FLIGHT SPECTRUM DATA
KAMAN AEROSPACE CORP BLOOMFIELD CT
Pagination or Media Count:
The report evaluates helicopter flight spectrum data previously recorded and published in other reports, with emphasis on the UH-1B utility, CH- 47A cargo, and CH-54A load lifting helicopters as used in the Army environment. A limited statistical analysis of the data is presented for those parameters for which sufficient data were available. The report includes a comparison of the flight-measured data with the spectrum appearing in Appendix A of Civil Aeronautics Manual 6, and with the assumed fatigue substantiation spectrum, where this was available. Discussion and evaluation of the spectrum variations that do occur, particularly as they might affect component fatigue lives, are also included. A method for deriving an operational spectrum for the classes of helicopters evaluated is presented along with discussion of some of the considerations and judgment which play a part in the establishment of a rational, conservative spectrum for the critical components.
- Transport Aircraft