If I am understanding the Navy patent correctly, here's the "secret sauce." Or the "not so secret", since it's public domain now.

Here's a top. We've all played with a top; you give it a good spin and the top rotates.

Hold that thought.

There are many ways to store energy:

1) you can store energy in the gas tank of your car

2) you can store energy in a battery

One way of storing energy, which sees infrequent use,

*is a flywheel.*
Kinetic energy in a flywheel can be expressed as

Ef = 1/2 I ω2 (1)

where

Ef = flywheel kinetic energy (Nm, Joule, ft lb)

I = moment of inertia (kg m2, lb ft2)

ω = angular velocity (rad/s)

We've all played with a flywheel; if you give it a slight tap it will go shooting off in the opposite direction.

From what I can see in this patent, the outer shell of the Navy craft behaves like a flywheel; it's an energy storage device.

Now...

*why wouldn't they just use a battery, like Elon Musk would?*
I'll get to that shortly.

Going back to our horn or transmission line loudspeaker, we understand that there are locations in the enclosure which are HIGH pressure and LOW pressure. If you've built a horn or transmission line loudspeaker, you are familiar with this phenomenon;

**specific frequencies will excite specific locations in the horn or transmission line.** This is how transmission lines work; they are resonant cavities.

Once again, a cutaway of our Navy craft.

Okay, if all of that made sense, then the next part should be intuitive:

We have two forces occurring simultaneously. The first is the centrifugal force of the outer shell of the Navy craft. The second is the resonance generated inside of the cavity. (Remember, there's a gap between the inner and the outer shell. Outer shell rotates, inner shell does not.)

The centrifugal force of the outershell behaves like a battery in a Tesla car; it is an energy storage device. It's a giant flywheel.

**The propulsion of the craft is initiated by generating a resonance in the cavity.**
If I'm not mistaken, it will work very similar to you 'pushing' a spinning top. But the key here is that the resonance in the cavity, generated by the microwaves, will repel the craft in the opposite direction of where the resonance is.

If you watch the video from the Rogan podcast, you can see how the craft is able to 'rocket off' at a 90 degree angle at a speed of something like Mach 10. The reason that it's able to accelerate at such a crazy rate of speed, at such a crazy angle, is very similar to hitting a top that's spinning on a table top.

Okay, that's my layman's description, here's what the Navy patent says:

US20170313446A1 - Craft Using an Inertial Mass Reduction Device

- Google Patents
*"The physical equation which describes the maximum intensity achieved by the high energy electromagnetic field generator (HEEMFG) system is described by the magnitude of the Poynting vector, which in non-relativistic for (accounting for all three modes of motion) can be written as:*

S max =f G(σ2/ε0) [R r ω+R v v+v R] (Equation 1),

where fG is the HEEMFG system geometric shape factor (equal to 1 for a disc configuration), σ is the surface charge density (total electric charge divided by surface area of the HEEMFG system), ε0 is the electrical permittivity of free space, Rr is the radius of rotation (disc radius), ω is the angular frequency of rotation in rad/s, Rv is the vibration (harmonic oscillation) amplitude, v is the angular frequency of vibration in Hertz, and the term vR is the curvilinear translation speed (acquired via a propulsive unit of either chemical, nuclear or magneto-plasma-dynamic (VASIMR) type attached to the HEEMFG system—the integrated unit being the craft).

[0012]

Therefore, if we consider only rotation, given a disc configuration, with σ=50,000 Coulombs/m2 a disc (spinning/axially rotating) radius of 2 m and an angular speed of 30,000 RPM, an generate an electromagnetic (EM) field intensity (Smax is the rate of energy flow per unit area, or energy flux) value on the order of 1024 Watts/m2 (this value does not account for any QVP interactions).

[0013]

Furthermore, if we couple the high frequency of rotation with high vibration (harmonic oscillation) frequencies in the range of 109 to 1018 Hertz (and above) we can obtain Smax intensity values in the range 1024 to 1028 Watts/m2 (and beyond). These extremely high EM field intensity values emphasize the novelty of this concept, especially suited for the design of energy generation machinery with power output levels much higher than those currently achievable."