11. The engine drove the propellor via double reduction gearing and a hydraulic coupling. 12. Secondly, you get a lot of gyroscopic effect from the propellor anyway. 13. The spy plane's outside left propellor tomahawked the Chinese plane in half. 14. The spy plane's outside left propellor chopped the Chinese plane in half. 15. The surveillance plane's outside left propellor tomahawked the Chinese plane in half. 16. Hovercraft are usually powered by gas turbines or diesel engines driving propellors and impellors. 17. Their propellors were removed and tow hooks were attached to each wing leading edge. 18. Almost every child over the age of 5 knows what an aircraft propellor is. 19. A single-propellor plane crashed shortly after takeoff on Friday killing all six aboard. 20. There is even a Victorian airplane propellor .