Longitudinal flying qualitites criteria for single-pilot instrument flight operations

Aharon Bar-Gill, Robert F. Stengel

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Experiments to determine the flying qualities of more than a dozen dynamic configurations have been conducted using the variable-stability Avionics Research Aircraft. Particular attention was given to variations in long-period longitudinal characteristics and their effects on the performance of simulated instrument flight rule flights from takeoff through landing. Over the range of values tested, lift-slope variations (−Zw) had the greatest effect on pilot opinion, workload, and tracking error. Bounds for satisfactory flying qualities were found for three parameters: phugoid-mode damping, stick force gradients (with respect to trim airspeed), and pitch/airspeed gradients.

Original languageEnglish (US)
Pages (from-to)111-117
Number of pages7
JournalJournal of Aircraft
Issue number2
StatePublished - Feb 1986

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering


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