NATURAL INTERFERENCE CONTROL TECHNIQUES. PART III. ELECTROMAGNETIC TRANSIENT PENETRATION OF AEROSPACE VEHICLE SYSTEMS,
LIGHTNING AND TRANSIENTS RESEARCH INST MINNEAPOLIS MINN
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The discussion is aimed primarily at a descriptive statement of the physical properties of molecular plasmas in the atmosphere, and their potentialities as hazards to aircraft. The ideas are deduced by consideration of a wide variety of manifestations of atmospheric electricity. All of these phenomena point conclusively to the widespread existence of atmospheric molecular plasmas. Practical metal skin enclosures such as aircraft, missiles and other aerospace vehicles and weapons systems usually have electrical discontinuities at joints, access doors, inspection panels, fuel caps, ports, covers and other points due to construction and operational requirements. The cables connected to rocket vehicles prior to launch also can cause voltages to be coupled inside the vehicle during a lightning stroke. These voltages may be reduced to the sheath iR drop with a well shielded system and techniques are also available to reduce sheath currents.