| 41. | The shafts drive two five-bladed variable-pitch propellers.
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| 42. | In the 1940s, NACA started researching propellers with similar sweep.
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| 43. | The nun hears his propeller for the last time . ..
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| 44. | Her generator powered everything from the propeller to the running lights.
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| 45. | Some of these then began to get entangled with the propeller.
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| 46. | Later all aircraft were fitted with three-blade metal propellers.
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| 47. | It was fitted with a Crossley engine and a single propeller.
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| 48. | Noise pollution caused the nearly blind animal to collide with propellers.
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| 49. | She was the first Royal Navy vessel to have twin propellers.
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| 50. | The aircraft was a pusher Chauvi�re propeller was mounted behind it.
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