vibration-response character- tric lamps within the camera box are timed to switch istics of the fuselage of the Consolidated N2Y-1, a on and off at regular intervals and provide the illumi- 5-cylinder Navy training airplane weighing about nation necessary for taking records of the instrument L,500… … Figure 8—Flexible mounting of PW-9 airplane for vibration-response tests. developed at the time, the vibrograph was used in every 6 to 12 inches, and a complete record of the recording the vibration. The vibrator was mounted vibration in any one position was obtained for the on the top cylinder in…
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