After the failure of his first design, the Brantly B-1, Newby O. Brantly decided to design a simpler and less complicated helicopter for the private buyer. The B-2 had a single main rotor and an anti-torque tail rotor and first flew on 21 February 1953. This was followed by an improved second prototype that first flew on 14 August 1956. The B-2A was introduced with a modified cabin, and the B-2B had a larger 180 hp fuel-injected engine. The B-2B has a three-bladed articulated main rotor and an all-metal fuselage, it can be operated with skid, wheel or float landing gear. The piston engine is fitted vertically in the fuselage behind the cabin. Variants Brantly B-2: Two-seat single-engined light utility helicopter. Brantly YHO-3: United States military designation for the B2. [*]Brantly B-2A: Initial production version. [*]Brantly B-2B: Improved version, fitted with new metal rotor blades, and an uprated fuel-injected 180 hp Lycoming piston engine. [*]Brantly 305: Larger five-seat version. [*]H-2: Designation of the B-2B built by Brantly-Hynes between 1976 and 1979. [*]Brantly B-2J10: Projected tandem-rotor version with longer and wider fuselage for carrying passengers and/or cargo. Unbuilt. [*]V750 UAV: An UAV version developed by Qingdao Haili Helicopters Co. Ltd., a joint venture between Brantly International Inc, Qingdao Wenquan International Aviation Investment Co., Ltd, and Qingdao Brantly Investment Consultation Co., Ltd.[5] Maiden flight was completed in May 7, 2011, and received an order from an unnamed customer