Franklin XO-540-7
| 8 series | |
|---|---|
| Type | 8-cyl. horizontally opposed air-cooled piston engine |
| National origin | United States |
| Manufacturer | Franklin Engine Company |
The Franklin 8 series of 8-cylinder air-cooled horizontally opposed aircraft engines produced in the 1940s and 1950s, (US military designation O-540 was applied to the 8ACG-538, 8ACSA-538 and 8ACGSA-538).
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Data from:
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Wikipedia