| 21. | The propeller was attached to the crankcase ( the opposite of radial engines ).
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| 22. | Two were completed and flew with several different radial engines.
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| 23. | The plane was powered by two Bristol Pegasus radial engines.
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| 24. | A Anzani 6-cylinder radial engine may also have been fitted.
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| 25. | A variety of radial engines were available for the DC-3.
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| 26. | The aircraft was powered by a Pratt & Whitney Twin Wasp Junior radial engine.
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| 27. | Nearly all aircraft radial engines since have used NACA-type cowlings.
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| 28. | Most cam engines were thus opposed twin or radial engines.
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| 29. | Power was provided by a single Nakajima Hikari radial engine.
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| 30. | It was later fitted with a stronger radial engine 80 hp Armstrong Siddeley Genet.
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