The Aérospatiale Alouette II is a French light helicopter originally manufactured by Sud Aviation and later Aérospatiale. It was the first production helicopter powered by a gas turbine engine instead of the heavier conventional piston powerplant. On 12 March 1955, the prototype SE 3130 performed its maiden flight. The Alouette II was a widely used type and popular with operators, with over 1,300 rotorcraft eventually being constructed between 1956 and 1975. The type was predominantly used for military purposes in observation, photography, air-sea rescue, liaison and training, but it has also carried anti-tank missiles and homing torpedoes. A high-altitude derivative, the SA 315B Lama, was developed and entered operational service in July 1971. The Alouette II also was further developed into the larger and more powerful Alouette III. In 1975, production of the type was terminated, having been effectively succeeded by these newer rotorcraft. Despite it being long out of production, considerable numbers of Alouette II were still in service at the start of the 21st century.
| Country of origin | France |
| Performance | Maximum speed: 185 km/h (115 mph, 100 kn) at sea level |
| Cruise speed: 170 km/h (110 mph, 92 kn) | |
| Range: 565 km (351 mi, 305 nmi) (with maximum fuel) | |
| Endurance: 4.1 hr | |
| Service ceiling: 2,300 m (7,500 ft) | |
| Rate of climb: 4.2 m/s (820 ft/min) | |
| Dimensions: | Length: 9.66 m (31 ft 8 in) (overall, blades folded) |
| Height: 2.75 m (9 ft 0 in) | |