Helicopter Design for Handling Qualities Enhancement

This research aims to bring HQ's (Handling Qualities) assessment according to ADS-33E-PRF into early stages of helicopter design process, namely late conceptual and early preliminary design phase. Effects of three design parameters, namely disc loading, rotor tip speed and blade loading coefficient, on bandwidth phase delay criterion of the ADS-33E-PRF for pitch channel is investigated for the hover condition flown by a 10 degrees of freedom Bo-105 like simulation model. After setting practical design constraints, the variation of each design parameter has been plotted in bandwidth-phase delay graphs. The results indicate that disc loading eventuated as the "grouping" parameter, forming isoline maps for tip speed and blade loading coefficient. Furthermore, the different sets of disc loading isoline maps generate a curved non-linear pattern, inherently with a three dimensional translation. High disc loading with high tip speed and low blade loading coefficient configuration resulted in Level 1 handling qualities. Low disc loading cases provide a wide spectrum of phase delay values with a small interval of possible bandwidth, visa versa for high disc loading case. The paper provides an insight into the design space available in means of bandwidth-phase delay analysis in hovering flight
Citation Formats
İ. Yavrucuk, “Helicopter Design for Handling Qualities Enhancement,” presented at the 35th European Rotorcraft Forum 2009, ERF 2009 (22 - 25 Eylül 2009), Hamburg; Germany, 2009, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/73365.