Abstract
The automatic flight control system is a desirable aid to the handling qualities, stability augmentation, and safety of the present day VTOL aircraft. This has been verified in recent flight tests of the VJ101C VTOL built for the German Defense Ministry. Flight and simulator experience gained on this program emphasizes the need for stability augmentation in at least the pitch and roll axes. Other features, such as control stick steering and engine failure protection, were also provided. Since some of the flights were performed on a telescopic simulator, the range of control parameters could be expanded to permit a wider range and better separation of the control variables. All three phases of the VJ101 program as well as three distinct prototypes are described.
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