the amplitude and frequency of oscillations induced by the servo system. In fact, under the influence of both controls, oscillation is almost undetectable.
As a consequence of such tests, it is possible to predict the type, size and frequency of oscillations which the servo-control equipment will introduce into the balloon flight. This is especially significant since it is known from flights on which no control equipment was included that oscillations do occur naturally within the atmosphere, apparently as a result of vertical cellular convection currents. By knowledge of the frequency of oscillation caused by a given control system it is possible to analyze oscillations and determine which are caused by control and which are atmospheric. The wiring diagram of the flight-similitude system is shown in Figure 19.
Figure 19. Wiring diagram, flight-similitude system.