Object Collection: Propulsion
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Heath-Henderson B-4 In-line Engine
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Heinkel (von Ohain) HeS 3B Turbojet Engine, Reproduction
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Hendee Indian Rotary 7 Engine
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Hispano-Suiza Model 8 Ca, V-8 Engine
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Horizontally-opposed 6, Lycoming AEIO-540-D4A5 Engine
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Humber Ltd. (Bentley) B. R. 2, Rotary 9 Engine
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In-line 3, Elbridge Featherweight
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In-line 4, Curtiss Model K
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In-line 4, Kemp (Grey Eagle) I-4 or D-4
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In-line 4, Maximotor B-4 Engine
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In-line 4, Roberts 4X Engine
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In-line 4, Wright Vertical 4
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In-line 6, BMW Model IIIA Engine
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In-line 6, Kirkham B-6
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In-line 6, Menasco Buccaneer B6S Inverted Engine, Charles A. Lindbergh
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In-line 6, Roberts 6X
