Grey Area,
I'm afraid that I am going to have to disagree with you there about your statement about the Lynx. Firstly, the Phase Lag is 75 deg, secondly, with the AFCS OUT, it suffers massively due to this so called 'PITCH/ ROLL' couple - as in the R22 (note – this is not the ‘Acceleration Cross couple as explained by Ray Prouty/ not even he could explain this one!!). The only difference is that due to the nature of the Head - the rate of roll produced by an Aft/ Fwd movement of the cyclic is incredible. After a considerable amount of research and Flight testing into this subject, our conclusions are the same as for Lu Zuckerman. The only question that still remains un-answered is ‘Why has it been designed this way?’
Lu – regardless of the analogy of ‘GYROSCOPIC PRESSESSION’ that Ray Prouty uses to explain the flapping of the disc, it is WRONG. If indeed the disc did act as a GYRO – then where is the secondary/ tertiary etc pressession? What about the OTHER property of a gyro – RIGIDITY IN SPACE? If the disc were a gyro, then it would be uncontrollable!! There is a far easier/ factually correct explanation, which holds true for ALL helicopter Principles of Flight. It involves the application of Pitch – due to the swash plate, and its effect on RATE OF FLAPPING!!
