This
is the ‘new’ version of a solar energy
concentrator which creates a bright ‘mini-sun’
rising towards the heavens over the course of an afternoon. Frames
either side, pointing towards the north-east, allow ropes to rotate
the ‘sail’. Four frames
are required; two to stabilise the front of the sail and two more for
the opposing end:
I
hung a ball off the hinge to make it clear where the hinge is: It's
unnecessary, but I thought it might make it easier to see how the sun
would appear to rotate around the Earth’s hinge
(polar axis).
The
test arrangement (above) is also a 30% reproduction of Stonehenge’s
structure, but slightly lowered to make focusing easier: To duplicate
the rigidity required, the frames have stabilizing cross-bars locked
to ground-pegs at the bottom (stone was way too expensive).
Fixed
mirrors (see bottom left in photo below) were placed in an inward
facing circle at exactly the same place as Stonehenge’s
inwardly facing outer stone circle. Energy is concentrated to the
reflector (at the end of the ‘sail’) to
produce the ‘mini-sun’:
I also
covered the frames in cloth (photo below) to make the arrangement
easier to visualise. Locating holes (preferably three) for the polar
axis are required in the frame to the south: The same number of
vertical holes, directly south of centre, exist at Stonehenge on its
southern ‘Trilithon’ set
(Stones numbered 53, 54 & the lintel 154):
The
‘Trilithons’ proved to be
in exactly the correct place to allow hauling of the sail around the
polar axis. From the 3-D virtual models I knew they would, but it was
great to see it work in practice:
In
ancient times, and right up until a few hundred years ago, the Earth
was thought to be fixed at the centre of the Universe. This system
shows how the Sun appears to rotate around the polar axis of the
Earth; shown here as a ball suspended off the hinge:
The
Sun can be used to create the appearance of a ‘sun-child’
rising up on the cross formed by the sail and the rod of
the polar axis: As the sun sets, the ‘child’
rises. In the picture below, a view is shown as it would
appear if you were standing in Stonehenge itself. Two ‘suns’
can be seen:
The
arrangement can be set up in about two hours. I didn't bother to
accurately align anything for this test, so some of it will be
arranged slightly differently for the eventual configuration. It’s
also become apparent that the best time to do this will be in winter:
In the earlier winter tests, perhaps due to the coldness, the air
shimmers and creates an expanded ghost-like form around the
reflector.
Note
that sun-glasses are essential:
I
wondered if this description; a child of the sun-god rising on a
cross, might possibly explain why England was the first
country to adopt Christianity?


