Names and dates
| Market original model designation | Merlin | | Market model designation (english translation or spelling) | Merlin | | Also known as | X40 | | Also known as (english translation or spelling) | X40 | | Project start date | 1952 | | First flight date and time | 1953 | | Project end date | 1958 | | Country of manufacture | Switzerland |
People involved
| Robert Stierlin | Constructor, Test pilot | | Roger Mercier | Constructor, Test pilot |
Config info
| Rotorcraft type | Helicopter |
Weights
| Manufacturers empty weight (MEW) | |
Cabin and cockpit
| Maximum number of people onboard | 1 |
External dimensions
Main rotor
| Main rotor type | Semi-rigit | | Main rotor equipped with stabilizing bar | Yes | | Main rotor diameter | | | Main rotor direction of rotation | Counterclockwise | | Minimum main rotor angular speed | | | Maximum main rotor angular speed | | | Number of blades | 2 | | Main rotor blade airfoil | NACA 23012 |
Tail rotor
| Tail rotor type | Classic tail rotor | | Drive type | Drive shaft | | Tail rotor diameter | | | Tail rotor direction of rotation | Counterclockwise | | Tail rotor angular speed | | | Number of blades | 2 |
Powerplant
| Engine model | Salmson | | Engine model (english translation or spelling) | Salmson | | Engine type | Piston | | Total maximum power | | | Angular speed at max power | |
Fuel system
| Average fuel consumption [volumetric] | |
Performance
| Maximum horizontal flight speed (Vh) | | | Hover ceiling IGE | | | Hover ceiling OGE | | | Maximum flight endurance | |
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