Could experimental craft be the reason for the rumbling around the country? That's what this article says, that the craft is the cause of rumbling
felt in Vancouver, and in other locations. Just a theory though, and I doubt that the U.S. would admit this anytime soon.
The rumbling was an affect of the Magnetoplasmadynamic (MPD) / lithium Lorentz force accelerator (LiLFA) engines falling to light properly apparently.
Magnetoplasmadynamic (MPD) / lithium Lorentz force accelerator (LiLFA) Magnetoplasmadynamic (MPD) thrusters and lithium Lorentz force accelerator
(LiLFA) thrusters use roughly the same idea with the LiLFA thruster building off of the MPD thruster. Hydrogen, argon, ammonia, and nitrogen gas can
be used as propellant. In a certain configuration, the ambient gas in Low Earth Orbit (LEO) can be used as a propellant. The gas first enters the main
chamber where it is ionized into plasma by the electric field between the anode and the cathode. This plasma then conducts electricity between the
anode and the cathode. This new current creates a magnetic field around the cathode, which crosses with the electric field, thereby accelerating the
plasma due to the Lorentz Force. The LiLFA thruster uses the same general idea as the MPD thruster, except for two main differences. The first
difference is that the LiLFA uses lithium vapor, which has the advantage of being able to be stored as a solid. The other difference is that the
cathode is replaced by multiple smaller cathode rods packed into a hollow cathode tube. The cathode in the MPD thruster is easily corroded due to
constant contact with the plasma. In the LiLFA thruster the lithium vapor is injected into the hollow cathode and is not ionized to its plasma
form/corrode the cathode rods until it exits the tube. The plasma is then accelerated using the same Lorentz Force.
edit on 19-3-2012 by Brandon88 because: (no reason given)