AN AIRBORNE INDICATOR FOR MEASURING VERTICAL VELOCITYnOF AIRPLANES AT WHEEL CONTACT

摘要

An airborne vertical-velocity indicator has been designed in order to provide a means of obtaining measurements of airplane vertical veloc¬ity at the instant of wheel contact.nOne such indicator was tested in the Langley impact basin to deter¬mine its accuracy and was flight-tested with a small trainer-type air¬plane to determine its practicability. Vertical velocities ranging from 0.5 to 7.5 fps were obtained in the impact-basin tests. In the flight tests the velocities ranged from 0.5 to 3.2 fps. A second such indicator has been built and flight-tested on a high-speed jet bomber.