The AC-14 continued the Cantinieau practice of mounting the engine forward of the main rotor, and like the Norelfe, used the ducted exhaust from the turboshaft to counter the torque of the main rotor at low speeds, while at high speeds the exhaust gases were deflected rearwards to increase speed, torque being compensated for by movable twin tail fins.
The first of prototype flew on 16 July 1957. A pre-production order for ten machines was placed by the Spanish Air Force where they served for a short time under the designation EC-XZ-4. No full production ensued, as they were much more expensive than the second hand Bell 47G-2 and G-3.
Data from Janes' All The World's Aircraft 1961–62
- Crew: 1
- Capacity: 4 passengers
- Length: 8.13 m (26 ft 8 in)
- Height: 3.10 m (10 ft 2 in)
- Empty weight: 650 kg (1,433 lb)
- Gross weight: 1,250 kg (2,756 lb)
- Max takeoff weight: 1,350 kg (2,976 lb)
- Powerplant: 1 × Turbomeca Artouste IIB , 300 kW (400 hp)
- Main rotor diameter: 9.65 m (31 ft 8 in)
- Main rotor area: 72.35 m2 (778.8 sq ft)
- Maximum speed: 180 km/h (110 mph, 97 kn)
- Cruise speed: 150 km/h (93 mph, 81 kn)
- Range: 300 km (190 mi, 160 nmi)
- Ferry range: 640 km (400 mi, 350 nmi) (with auxiliary tanks)
- Service ceiling: 6,800 m (22,300 ft)
- Rate of climb: 6.99 m/s (1,375 ft/min)
Aircraft of comparable role, configuration and era
- Taylor 1961, p. 127.
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
- Taylor, John W. R. (1961). Jane's All The World's Aircraft 1961–62. London: Sampson Low, Marston & Company.
- Simpson, R. W. (1998). Airlife's Helicopters and Rotorcraft. Ramsbury: Airlife Publishing.
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