Alouette II 6mm

The Aérospatiale Alouette II is a light helicopter originally manufactured by Sud Aviation and later Aérospatiale, both of France. The Alouette II was the first production helicopter to use a gas turbine engine instead of the conventional heavier piston powerplant.
The Alouette II was mostly used for military purposes in observation, photography, air-sea rescue, liaison and training, but it has also carried anti-tank missiles and homing torpedoes. As a civilian helicopter it was used for casualty evacuation (with two external stretcher panniers), crop-spraying and as a flying crane, with a 500-kilogram (1,100 lb) external under-slung load.

I would recommend the Grey PA12 material as it's stronger than the detailed plastic but smoother than the versatile plastic options.