Dust impact? Glow discharge? Dust contaminates the N2O2 plasma?
Bright yellow glow from helicopter rotors http://www.michaelyon-online.com/the-kopp-etchells-effect.htm (from http://sprott.physics.wisc.edu/pickover/pc/realitycarnival.html) (((((((((((((((((( ( ( ( ( (O) ) ) ) ) ))))))))))))))))))) William J. Beaty SCIENCE HOBBYIST website billb at amasci com http://amasci.com EE/programmer/sci-exhibits amateur science, hobby projects, sci fair Seattle, WA 206-762-3818 unusual phenomena, tesla coils, weird sci