arrow d a round knob is attached to the outer end of shaft 44 to simulate a typical throttle control a fork assembly 43 is mounted at the inner end of shaft 44 and is coupled to lever arm 42 by rotatable bushing 49 arm 42 operates control shaft 41 of potentiometer 40 thus movement of knob 47 inward and outward simulates the operation of the throttle of the aircraft in fig4 the arrangement for operation of the rudder potentiometer is shown rudder potentiometer 50 is mounted into base unit 52 along with weights 54 which may be included to give the unit stability a felt or rubber mat may be also attached to the bottom surface thereof to provide friction with the floor a bushing assembly 56 is provided which couples crossarm 58 to potentiometer 50 such that movement of pedals 60 by the user 39 s feet will cause rotation of potentiometer 50 since the rudder control is not critical the rudder control potentiometer may be mounted on panel 13 and controlled by knob 51 as shown in fig5 and in phantom view in fig1 this alternative arrangement reduces the cost of the controls simulator since normally only a small movement of rudder pedals is required it may be desirable to drive potentiometer through a gearing arrangement such that a small rotation results.