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The BICh-7 was a tailless sport/touring aircraft designed and built in the
USSR
The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen nationa ...
from 1929.
Development
Chyeranovskii designed an enlargedBICh-3
The BICh-3 (russian: БИЧ-3) was a tailless research aircraft designed and built in the USSR
The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia f ...
, at approximately 1.5 scale, with tandem open cockpits, underslung elevons (à la Junkers) centreline mono-wheel, wing-tip rudders with skids with no tail. Flight testing commenced in 1929 but was soon halted due to the very poor handling characteristics which rendered the BICh-7 almost impossible to take off.
The BICh-7 was completely rebuilt as the BICh-7A, modifications included: enclosed tandem cockpits, a conventional style tail-skid undercarriage, and a fin with rudder faired into the rear of the cockpit nacelle.
Flight tests resumed, in 1932, with much improved handling other than excessive speed loss when turning and engine vibration. The speed loss was attributed to interference between the large elevons and the rudder and was alleviated by adding breaker strips to the elevons and setting them at a lower incidence.
Variants
* BICh-7 – initial unsuccessful version with open cockpits wing-tip rudders and skids and centre-line mono-wheel. * BICh-7A – Modified version with enclosed cockpits, fin and rudder and conventional style tail-skid undercarriageSpecifications (BICh-7A)
See also
References
* Gunston, Bill. "The Osprey Encyclopaedia of Russian Aircraft 1875 – 1995". London, Osprey. 1995.External links
* http://www.ctrl-c.liu.se/misc/RAM/bich-7.html {{DEFAULTSORT:BICh-07 1920s Soviet and Russian sport aircraft Chyeranovskii aircraft Single-engined tractor aircraft Aircraft first flown in 1929