NoLongerOnTheBall
NASA Technical Memorandum: 81238 A Mathematical Model of the CH-53 Helicopter (Page 17, Equations of Motion) .. "The helicopter equations of motion are given in body axes with respect to a flat, nonrotating Earth." https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19810003557.pdf
22:52
+299