Coanda design question

[PALG]

Thankyou Kees - you've been extremely helpful, a real source of help.

I can now read the English patent - i got a much better result on my home PC. Great detail. Very interesting, too, to see his crucifom tail design married to one his Bristol Coanda-type designs. I'll read it in detail.

However, I took a closer look at the model of the unrealised Coanda 1912/1913 I posted earlier, and COanda seems to have persisted a little further with the concept - Although, as you say, it still went nowhere. It does appear to have the crucifom design as well. If you look beyond the propeller blades, you can see what appears to be the upper half of the configuration.

Beautiful model of the Coanda 1910 - and yes, refined in several respects.

I noticed the same thing with the display (and wind tunnel ?) model of his Coanda Twin 1911 - much improved with more refined nose, engine cones/cowlings, longer lower wing and overall more finished:

[Varese2002]

I know this picture of the 1/5 th size model of the 1911 Coanda biplane, allegedly on the 3e Exposition de la Locomotion Aérienne in Paris (held from December 16, 1911 till January 2, 1912).

Unfortunately I have never been able to find any report on this model in the Flight reports and / or other publications.

A 1/5 th model is probably quite large for the Eiffel soufflerie / windtunnel, but it could be, I could not find information about the size of models for that windtunnel. A few wind tunnel models (not necessarily the ones from Coanda) seem to be preserved in the Paris Musée de L'Air et L'Espace.

Cheers

Kees