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Posted

Onetracks comment at top of page was posted five times. I deleted the four additional posts. Subsequent posts refer to the multiple posts.  (Moderator).

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Posted

This designers smiled with a ring of confidence when this flew:

1913 Lee Richards Annular Monoplane. Circular winged prototype aircraft. |  Natural phenomena, Airship, Experimental aircraft  image.jpeg.ecf6b385257bf06afaba3ca51211e337.jpegimage.jpeg.8df65f157962bd25abc31592f02e0531.jpeg

 

The aircraft is the Lee-Richards annular monoplane, built by  Cedric Lee and G. Tilghman Richards in the UK. The circular wing was not their idea. Following a series of patents on circular-wing aircraft taken out by Williband Franz Zelger and Isaac Henry Storey, John George Aulsebrook Kitchen built an annular-wing biplane but was unable to fly it. Cedric Lee bought the biplane and the patent and also later acquired Zelger's patent. Tilghman Richards joined Lee in 1910 and together they finished the aeroplane, fitting a 50 hp (37 kW) Gnome Omega engine in the front. This wouldn't flywell, and was eventually destroyed when the hangar it was in collapsed in a windstorm. Lee and Richards continued experimenting with models. Model tests of a new design at the National Physics Laboratory gave promising results, suggesting that an annular monoplane would be aerodynamically stable and have benign stalling characteristics.

 

The wing itself took the form of a flat ring or annulus, curved to form an aerofoil shape in section and with upward dihedral raising it progressively towards the tips. The leading edge of the front portion was initially curved downwards to promote vortex lift over the side and rear surfaces. The wing was rigged with a significant angle of incidence, the forward section being level with the top of the fuselage and the aft section with the lower fuselage. The column of air flowing through the central hole was intended to improve the wing's stability in flight. There was provision for two crew. An 80 hp (60 kW) Gnome engine located in the front, driving a tractor propeller provided the thrust. The undercarriage was a tricycle arrangement.

 

Three prototypes were built and proved to be very stable and pleasant to fly. Further development was stalled by WWI

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Posted

Further development would be stalled from having a rethink about it. IF it looks really wrong , it most likely is.. Is there anything in nature resembling it acknowledging a Jumbo sized BEE would never get off the  ground.   Nev

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Posted
33 minutes ago, facthunter said:

Their larger feathers at the tips act as good control mechanisms. That multi plane effort is a shocker. It probably wouldn't even work as a kite.   Nev

And kites were a great way to prove concepts - it worked well for Hargraves.

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