The Bolkhovitinov S (Sparka – twin/joined (engine)) was a high speed bomber aircraft designed and built in the USSR from early in 1937. Other designations used at various times: BBS, BB, LB-S or SSS.
The Boeing F2B was a biplane fighter aircraft of the United States Navy in the 1920s, familiar to aviation enthusiasts of the era as the craft of the Three Sea Hawks aerobatic flying team, famous for its tied-together formation flying.
