...Tak Kit Lau; Yun-hui Liu The perplexing cross-coupled responses between the control axes on hingeless helicopters have puzzled researchers for years. Unlike previous studies, which introduced a physically meaningless phase-lag to account for the cross-couplings, this paper proposes a new method...

... x z , simulations of the flying helicopter in a few representative maneuvers were performed for different values of the product of inertia; the results indicate that, for the examined conditions, the response is largely unaffected, even by errors as large as 100%. This is probably due...