The "Flying Barrel" is actually the plane designed by William Pierce Gary and his Non-Capsizable Aeroplane Co.
It went through various evolution stages, from 1909 to 1913. With and without side winglets.
Apparently nicknamed "Hoople" because of its resemblance to a hoop.
It was destroyed when nosing over in a severe ground loop, as could be anticipated from such a design.
The Bertrand machine is the 1910 "Unic No 1 RB".
And contrary to Gary's Hoople, the circular part is not meant to be a wing and generate lift.
Instead, it is meant to improve the thrust of the airscrews placed at each end. One could think of it as a ducted fan, or as the ancestor of the Caproni Stipa.
USSR, Suhanov, 1940, STOL:
600 kmph, 800 HP Hispano-Suiza engine, diameter - 3 m. First project by Suhanov - 1936.
Also, data of project of 1942-1943 - also, diameter 3 m, 1600 HP Shvetsov M-82A, weight 2500 kg, diameter of two propellers 3 m, maximum speed 740 kmph, speed on 3000 m 640 kmph.
Name - "Koltseplan" (Rus. Кольцеплан, "Ring-plane"), today use for analogical schemes of airplanes.
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Germany, G. Koch, 1893, steam machine, 50 HP:
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Other famous tube airplanes - Stipa-Caproni, Heinkel Wespe, Heinkel Lerche, Givaudan airplane, later - SNECMA C-450, Lockheed Ringwing, Convair Model 49, other coleopteres.
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