Force, F, can come from mass, m, and acceleration, a.
F = m a
A Force field has a proportional acceleration or gravity, g.
F = m g

Force can come from two electrical currents.
F = i x B = i x uH = i1 x ui2
u = permeability factor on lines of field per current and can have voltage, v, and frequency, f, dependency (assume one to work in smaller voltages - do not want to go to millions of volts as well as this region is not known to me (Tesla achieved Millions of volts))

Magnetic field, B or H is a circular field coming from
a current I. H is distinct from current I being circular,
otherwise it the same in magnitude with different
path and units. Maxwell Equation curl H = I, meaning a
circular Magnetic field, H, results from a straight line
current, I.

Current I having charge, velocity and time dependencies
is a straight wire carrying current that will create the
so called tube of magnetic field.

Normal current flow, I, is produced by the Electric field,
E, which was a result of a Voltage, V, potential.

A free space electron current, If, are negative charges that
are removed from metal by high Electric fields in proportion
to E to the square.

Coil up the wire flat and create a radial Magnetic field of
which we take one line and find the perpendicular intersecting
line by finding the slope. Break out the analytical geometry
books and see the negative reciprocal is what we want.

That is the y = mx, m = y/x and intersect slope = -x/y.
However now we must go back to the radial field.

The spiral coil will oscillate in time causing the field
to alternate in a straight line causing an E field to set
up as a circular path. Maxwell Equation curl E = dB/dt,
meaning a circular Electric field, E, results from the
alternating Magnetic field, B.

A circle has a slope that intersects all radial lines,
dy/dx = -x/y, ydy + xdx = 0, y^2 + x^2 = r^2 is the
path equation of the Electric fields, E, in this case.

The circular alternating Electric field can set up an alternating
charge flow that lights up and thereby creates a disc of light.
We might see this in a laboratory or as ball lightning or if
UFOs use high voltage coils, then they might exhibit such a
phenomena. So a swirling charge creates light, but there is more.

What happens to the rest of the Magnetic field because it is
a closed loop. A field on top and bottom will form and if that
lights up from charges then a three dimensional ball lighting
will exist.

A few more things to sum up. The free electron cloud at high
strength will ionize even rarefied air and most likely create
emission of UV or violet light from nearby molecules.

If a separate Electric field from a high voltage spark gap is
sent in one direction, a flow in the surrounding space can take
place.

The interaction of the fields can cause the motion and force and gravity and acceleration field for air craft that are never identified. The puffy or comb clouds are perhaps residue of the high voltage interactions in a flyby as the field swishing or swimming action observed on some videos.
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The above is not the Tesla static electricity pump
or pulsed ether voltage from his flat coil.
See William Lyne documents at scribd.com,
pdf doc download of 1907 craft design with UFO
characteristics:
http://pritchardschool.com/Teslas_Flying_Machine.pdf
See also:
http://lyne4lyne.tripod.com/tesla.htm
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Aether theory, gravity well and FOO 1944 links in my video response Slide Show info section. (less info)