Super Rotor Andorinha
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The Super Rotor AC.4 Andorinha ("Swallow") was a sport autogyro first produced in Brazil in the 1960s.[1] The prototype was built by Altair Coelho and flown in 1960 as the AC.1,[2] a typically minimalist autogyro design consisting of an open framework supporting the pilot's seat, rotor mast, engine mounting and tail fin.[3] Power was supplied by a converted Volkswagen engine driving a pusher propeller.[3] Francisco Mattis purchased the prototype and manufacturing rights and founded Super Rotor (now Montalva) of São Paulo to produce the aircraft.[3] Refinements for serial production as the AC.4 included an extra reinforcing strut for the rotor mast and a larger tail fin.[2] According to Altair Coelho, the AC.4 first flew in 1964, and gained type approval and certification in 1972. 314 were built.
| AC.4 Andorinha | |
|---|---|
| General information | |
| Type | Sport autogyro |
| National origin | Brazil |
| Manufacturer | Super Rotor/Montalva |
| Designer | Altair Coelho |
| Number built | ca. 450 |
| History | |
| First flight | 1960 (as AC.1) |
Super Rotor went on to produce a two-seat version with dual controls as the M.1 Montalva,[1][4] a turbo-charged two-seater as the M.2 Trovão Azul ("Blue Thunder"),[4] and an agricultural version with spray bars as the Agricóptero.[4]
Variants
- AC.1 - single-seat prototype with Volkswagen engine
- AC.4 Andorhina - single-seat production machine with Volkswagen engine. According to Altair Coelho, 314 were built.
- M.1 Montalva - two-seat trainer version of AC.4 with Volkswagen engine
- M.2 Trovão Azul - two-seat high-performance version with turbocharged Santana engine
- Agricóptero - agricultural version
Specifications (AC.4)
Data from Jane's All the World's Aircraft 1987–88, p.20 (except as noted)
General characteristics
- Crew: One pilot
- Empty weight: 166 kg (366 lb)
- Gross weight: 280 kg (617 lb)
- Powerplant: 1 × Retimotor RMV-1 , 60 kW (80 hp)
- Main rotor diameter: 7.60 m (24 ft 11 in) [2]
Performance
- Maximum speed: 160 km/h (100 mph, 87 kn)
- Range: 400 km (250 mi, 220 nmi)
- Service ceiling: 4,000 m (13,000 ft) [4]
- Maximum glide ratio: 6:1
- Rate of climb: 3.0 m/s (590 ft/min) [2]