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.
Turbo Compound
Three Power Recovery Turbines (PRTs), one of which is at the extreme left, provided nearly 600 hp at takeoff.
Turbo Compound
PRT Detail
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.
Turbo Compound
Crankshaft detail showing center main bearing, connecting rods and clamp joint.
Turbo Compound
Detail of cylinder head, intake valve and valve train.
R-4360 Cutaway
R-4360 nose case showing propeller reduction gear, front accessory drives and cam drives.
R-4360 aft view showing carburetion, supercharger and rear accessory drives.
R-4360 view along a bank of cylinders showing intake tube and low-tension ignition.
R-4360 view of master rod, dynamic vibration absorber, cam rings and drives.
R-4360 view of connecting rods.
R-4360 low-tension magneto cutaway.
R-4360 view of the nose case and propeller reduction gear.
R-4360 cylinder head, valves and induction passage.
