The Baumgärtl PB-64 was a 1950s single-seat helicopter designed and built by the Austrian-designer Paul Baumgärtl for the Brazilian Air Ministry.^[1] The PB-64 had an unusual rotor drive with two lightweight pulse jets mounted on the rotor, although not on the tips of the blades which was more normal.^[1] The engines were mounted at each end of a bar, at right-angles to the main rotor which also acted as a stabilizer bar.^[1] The main structure was a simple keel with a tricycle landing gear and an open seat for the pilot and a rudder on a simple tail boom.^[1]

Specifications

Data from ^[1] The Illustrated Encyclopedia of Aircraft

General characteristics

• Crew: 1
• Length: 4.60 m (15 ft 1 in)
• Height: 2.30 m (7 ft 7 in)
• Empty weight: 110 kg (243 lb)
• Gross weight: 227 kg (500 lb)
• Powerplant: 2 × ITA pulse-jets, 0.13 kN (30 lbf) thrust (13.60 kg thrust) each
• Main rotor diameter: 6.40 m (21 ft 0 in)

Performance

• Maximum speed: 130 km/h (81 mph, 70 kn)