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Cheranovski BICh-4
 
Encouraged by the results of his first successful model, Cheranovski set out to design a sport glider. The new BICh-4(Russian: Черановский БИЧ-4).
 
The 1925 BICh-4 repeated the layout of the previous BICh-2, except for the removal of the empennage, which in the previous model had been very ineffective.
 
The BICh-4 glider was designed as a single-seater flying wing built entirely of wood, with a textile coating. The thick wing featured parabolic in-plane shape and a thin trailing edge with control surfaces along the entire span, on which the elevons were located, capable of acting as ailerons and elevator rudders.
 
The wing construction maintained the same characteristics of the BICh-2 with a structure of 10 x 8 mm pine slats crossed and joined by glue and nails. To facilitate movement, the wing structure was divided into three sections. Final assembly and fabric coating were done at the flight site.
 
The pilot was located in an open cockpit inserted within the front region of the wing,
 
The landing gear featured a single wheel located in a fairing in the lower center of the wing. Small curved skids were located at the wing ends and a conventional tail skid at the lower rear.
 
The BICh-4 was completed in 1925 and was sent to the III National Competitions held in Koktebel in that year together with the “Trapetsia” and KIM-2 models, also built by Cheranovski. At the pageant it was flown successfully, piloted by P. Berzhbitski.
 
BICh-4
Wingspan: 11.40 m
Empty weight: 50 kg
Wing loading: 6.8 kg / m²
Glide ratio: 16
Accommodation: 1
 
 
 
 


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