Evaluation of a Helicopter-Fuselagemounted Dynamic-Neutralizer Static Electricity Discharging System

摘要

A static electricity discharging system, known as the dynamic neutralizer, has been designed, built and flighttested, and the results are presented herein. The dynamic neutralizer had been previously tested in a rotor-blademounted version as reported in a previous report (AD-406 212). The program discussed in the present report was concerned with the evaluation of this discharger when installed in the fuselage of an Army H-37 helicopter. The test data confirm that the principle of operation of the dynamic neutralizer is not affected by locating the entire device in the fuselage. The dynamic neutralizer utilized in this program was tested with generator voltages up to 60 kilovolts. With this voltage, the H-37 helicopter, operating under the natural charging conditions prevailing at the test site, was discharged to a minimum energy level of 3.4 millijoules from the estimated 1000 millijoules present in the helicopter before the discharger was put into operation. It appears, however, that better performance will be required for operational purposes. It is recommended, therefore, that further research be conducted toward achieving the required performance. (Author)