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| Wright R-2600-35 Although the PB4Y was originally fitted with P&W R-1830s, the LSFM's PB4Y was fitted with Wright R-2600-35s to perform its aerial firefighting mission. |
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| Wright R-3350 Turbo Compound Three Power Recovery Turbines (PRT), one of which is at the extreme left, provided nearly 600 hp at takeoff |
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| Wright R-3350 Turbo Compound PRT Detail |
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| Wright R-3350 Turbo Compound PRT (lower left) drives crankshaft through bevel gears and fluid coupling. Also seen are drive trains for the cam ring and secondary counterbalances. |
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| Wright R-3350 Turbo Compound Crankshaft detail showing center main bearing, connecting rods and clamp joint |
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| Wright R-3350 Turbo Compound Detail of cylinder head, intake valve and valve train |
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| Pratt & Whitney R-4360 Cutaway |
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| Pratt & Whitney R-4360 Nose case showing propeller reduction gear, front accessory drives and cam drives |
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| Pratt & Whitney R-4360 Rear view showing carburetion, supercharger and rear accessory drives |
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| Pratt & Whitney R-4360 View along a bank of cylinders showing intake tube and low-tension ignition |
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| Pratt & Whitney R-4360 View of master rod, dynamic vibration absorber, cam rings and drives |
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| Pratt & Whitney R-4360 Another view of connecting rods |
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| Pratt & Whitney R-4360 Low-tension magneto cutaway |
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| Pratt & Whitney R-4360 Another view of the nose case and propeller reduction gear |
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| Pratt & Whitney R-4360 Detail of cylinder head, valves and induction passage |
