It’s not even from Gerald Bull’s HARP project.
http://www.astronautix.com/articles/abroject.htm
http://www.astronautix.com/lvs/martlet.htm
http://www-istp.gsfc.nasa.gov/stargaze/Smartlet.htm
Hard theorized a liquid metal cooled electromagnetic drive for an aircraft a long time ago, but I highly doubt such even exists.
I’d go with thermite, but there is no mention of a bright flash in the sky.
Kinda hard to miss an aerial thermite reaction.
Typo alert!
HEard theorized a....
*sigh*
Me and my typos are gonna destroy the world, I swear.