Welcome Kelvin and thanks for pointing us to that site.
I've taken the liberty of adding the photos and description from that site :
"There is little known information on how this device came to be thus far. It was found and bought from
an antique dealer in Lesnaven, Brittany, France a few years ago. What can be said about it is that it is a
pretty serious device investigating somebody's theory or theories which point towards the Coanda effect
descovered by Henri Marie Coanda. His mother lived in the town of Morlaix, Brittany which is a mere 40kms
from where it was discovered and where he was known to have worked. The materials used and the methods
used in it's construction are of that of which you would find in aircraft built in the 1920's-1930's. The Fabric is
suspected to be French or Italian fabric of the 1920's according to a leading Vintage aircraft Fabric specialist.
An interesting feature is that it incorporates an internal contra-rotating fan which blows air at four separate
outlets, one every 90 degrees onto and over the Rotor-Wings as they rotate. The Wings are flapped at the
tips and the hinge lines are sealed by rubber seals to stop the higher air pressure under rotor wing leaking
through to the upper surface lower air pressure which would spoil the efficiency of the air flow and therefore
lift. The Flaps would only be deflected downwards maybe 10 to 15 degrees all in unison. This would help deflect
the airflow downwards over the increased curvature of the rotor-wing's top surface and in a span-wise direction
creating a lower air pressure and more lift. There is no directional control. Therefore it looks as though this device
has been designed and constructed with some kind of theory and is a test bed or prototype for a future design.
It would have cost a lot of money to construct such a device in the 20's or 30's. Indeed it appears that much money
would have been spent and hours worked to create this device maybe with a budget. That maybe the reason that
it is possibly a smaller or a scaled version prototype of something for the future and why it is Human powered. The
Empty weight is 60kgs (without the human engine or 'Piloclyst'). The Total span of the 'disc' (rotor-wing span) is 3.60m.
The Rotor-wings are 'gull' shaped. The aluminum appears to be Dural, All Ribs and Formers are Dural. Flap control wires
are piano wire apart from the handle bar control to the rotor head which appear to be stranded cables. The other parts
of the fan mechanism and structural parts of the Rotor head are light steel. The Frame work which supports the Rotor-
head and where the human engine is located is made from what appears to be electrical conduit tubing typical of the
type found in old buildings of the early 20th century (some ends are threaded). The hardware and markings are all Metric.
The pencil markings show numerals of the style of writing of the early 20th century and european (crossed sevens).
No Patents have been found thus far for this device.
So far, only one inventor has been identified as a likely Culprit. He has Patents relating to something very similar and
the possible 'Aerodynamics' or 'Fluid Dynamics' this device may be incorporating. Further research is in progress but
the machine now requries a new home. It is of significant historical importance to the history of aviation and would
benefit from being displayed in a avaition museum or collection for all to see.
Work would be required to make the machine opporational."
