content_image/564343.jpg content_image/564344.jpg
the right is to shift the airship slightly to the left so that if the air- ship were being flown along close to the right side of a wall or other obstruction, it would not be safe to put the rudder over sharply to the right in order to turn to the right and get away from the obstruc› tion, as the immediate effect of such an action would be to drive the airship into the wall. The approximate path of the airship when the rudder is put over to the right, together with several successive positions of the axis of the airship, are indicated in figure 22. 

e. It occasionally happens, especially when flying through foggy atmosphere, that an obstacle will suddenly loom up in front of the 

<img src='content_image/564343.jpg'>

<img src='content_image/564344.jpg'>

airship. To miss the obstacle t he pilot must first put over the rudder to deflect the nose of the airship and then completely reverse the rudder. In this case the action is as shown in figure 23. 

f. There is one other situatioll in which the direction pilot must exercise caution. As the airship turns under action of the rudder, centrifugal force acting on the center of gravity will swing the car to the outside. This action will so tilt the hu1l that the rudder will become in part an elevator. .Air striking on the inside of the rud› der will depress the nose of the ship. This depression can be stopped by prompt application of the elevator controls by the altitude pilot. However in some cases, especially when near the ground with a heavy airship, the altitude pilot may be unable to. use the elevators without endangering the tail of the airship. Hence the ’direction pilot must . 

