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Allison, V-1710E-19, 12-cyl vee with gearbox
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Continental, A-65, 4-cyl horizontally opposed, 65 HP
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Continental, R670-4, 7-cyl radial, 220 HP
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Drone engine, 2-cyl horizontally opposed
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Franklin, Model 99-E3, 4-cyl horizontally opposed, 90HP
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Henderson, 4 cyl upright inline motorcycle engine
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Jacobs, R755, 7-cyl radial, 245 HP
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Kiekhaefer, Model V-105-2, 4-cyl vee, 105 HP
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Kinner, model K5, 5-cyl radial, 100 HP
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Lycoming, 4-cyl horizontally opposed, 40 HP
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Lycoming, Model G0-435, 6-cyl horizontally opposed, 240 HP
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McCullock, Model 4310-A, 4-cyl horizontally opposed
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Nelson, Model H-44, 4-cyl horizontally opposed, 25 HP
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Pobjoy "Niagara", 7-cyl radial with spur-type reduction gear, 90 HP (no longer on display)
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Pratt and Whitney, R-1830, 14-cyl radial, 1200 HP (cut away display unit)
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Salmson, Model 9-AD, 9-cyl radial
- Wright, 14-cyl radial