. Problems in physics. Derived from military situations and experience . Figure 5. Drop Bombs in Place in Release Figure 6. Types of American Bombs. (From left to right, two fragmentation bombs, dummy bomb, two incendiary bombs, airplane flare. Note the arming devices like wind mills, which unscrew in flight and arm the bomb.) AERIAL BOMBING 77 63. A pilot flies into the wind in such a direction that objects onthe ground appear to move parallel to the drift-bar, set atzero. The compass reads due North. The pilot heads theplane due West and adjusts the drift-bar until objects ap-pea
. Problems in physics. Derived from military situations and experience . Figure 5. Drop Bombs in Place in Release Figure 6. Types of American Bombs. (From left to right, two fragmentation bombs, dummy bomb, two incendiary bombs, airplane flare. Note the arming devices like wind mills, which unscrew in flight and arm the bomb.) AERIAL BOMBING 77 63. A pilot flies into the wind in such a direction that objects onthe ground appear to move parallel to the drift-bar, set atzero. The compass reads due North. The pilot heads theplane due West and adjusts the drift-bar until objects ap-pear to move parallel to it. If the drift-bar is found to beset at an angle of 30 degrees with its zero position and theair-speed has been constant at 70 miles per hour, what isthe wind-speed and the direction of the wind?- 1 In the Wimperis type bomb-sight the wind-speed is found in themanner described. By a clever mechanical arrangement the setting of thedrift-bar automatically separates the up and down back-sights the cor-rect amount. 78 PROBLEMS IN PHYSICS DIRECTION SIGHTINGA pilot using the Wimperis-type bomb-sight mu
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