Viktor Nikolayevich Belyayev had an illustrious early career with
TsAGI,
AVIAVnito,
Aeroflot,
OMOS,
AGOS,
KOSOS and the
Tupolev OKB. He also designed and built several gliders from 1920, including flying wing designs. Belalyev and V.I. Yukharin, at the
Kazan Aviation Institute, designed a tandem seat single-engine research aircraft to investigate the properties of Belyayev's forward swept wing with raked tips, used on the
Belyayev DB-LK, particularly the resistance to structural instability and aileron reversal. The aircraft was to have had quite sharply swept forward inner wings, with the outer third swept back at a similar angle, all with ailerons, except for flaps on the inner half of the inner wings. Relatively small tail surfaces were envisioned at the end of a relatively long fuselage. The pilot and observer sat in enclosed cockpits, with the observer's cockpit halfway between the pilot's cockpit and the tail unit. ==Specifications (Babochka) ==