Electrostatic ills and cures of aircraft : II. Radio interference and its control

In the preceding companion article, the inescapable tendency of an airplane in flight to accumulate relatively heavy electrostatic charge was discussed, with especial reference to loss of communication through resulting radio interferences. In this concluding part, several types of devices for dissipating the static charges on aircraft are described and comparisons given by test results. It is shown that metallic bristles with chemically etched points may be applied so as to bleed off the charges as they form, and thus obviate radio interference and other attendant hazards to a degree heretofore not attained.