PERTH AMBOY BIRD BK (N789Y) was first built in 1929 by Bird Aircraft Corporation (later Brunner Winkle), with models A, B and C differing in powerplant. Model BK is a three-seater (front, side-by-side, single rear) powered by 100-h.p. Kinner K-5 radial.

A DETRACTABLE UNDERCARRIAGE: Mr. Mils Burcham, the American aerobatic pilot, looses a wheel from his Bird biplane while stunting at the recent National Air Races, Cleveland. Note the wheel bouncing on the ground. Burcham made a perfect dead-stick landing on one wheel.