| Cougar | |
|---|---|
 | |
| Type | Radial engine |
| National origin | United Kingdom |
| Manufacturer | Armstrong Siddeley |
| First run | 1945 |
The Armstrong Siddeley Cougar was an aero engine developed by Armstrong Siddeley in 1945. The design was a departure from earlier Armstrong Siddeley engines in many ways, as the company's only nine-cylinder radial design. Although the engine was tested, it did not find an aircraft application and did not see production.