https://en.wikipedia.org/wiki/Cierva_C.30

General characteristics

• Crew: 1
• Capacity: 1 passenger
• Length: 19 ft 8 in (6 m)
• Height: 11 ft 1 in (3.38 m)
• Empty weight: 1,220 lb (553 kg)
• Gross weight: 1,600 lb (726 kg)
• Powerplant: 1 × Armstrong Siddeley Genet Major IA 7-cyl. air-cooled radial piston engine, 140 hp (100 kW)
• Main rotor diameter: 37 ft 0 in (11.28 m)
• Main rotor area: 1,100 sq ft (100 m²)

Performance

• Maximum speed: 96 kn; 177 km/h (110 mph)
• Cruise speed: 83 kn; 153 km/h (95 mph)
• Range: 248 nmi; 459 km (285 mi)
• Rate of climb: 700 ft/min (3.6 m/s)