1920] 



on The Gyrostat ic Compass 



37 



the air box and producing the maximum movement in the oil. It 

 will therefore be seen that the movement of the pendulum and the 

 movement of the oil are out of phase with each other. It is for this 



reason, given good dynamic balance, that there is no quadrantal error 

 whatsoever with this method of control. 



Fig. ] illustrates the method of damping the compass. Fixed to 



