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 TM 55-1905-223-24-1
SECTION II. EQUIPMENT DESCRIPTION AND DATA
1-6. General Description. The KTA50-M is a 1250 hp, 16 cylinder, water-cooled diesel engine designed for
marine use. The main propulsion engines furnish drive power to the marine gear. The main propulsion
engines are equipped with remote and local control stations.
1-7. Characteristics, Capabilities, and Features. A very broad view of the main propulsion engines is as
follows:
a. Characteristics.
(1) Turbocharger allows more horsepower to be developed.
(2) Fuel injectors deliver atomized fuel into combustion chambers for ignition by heat of
compressed air.
(3) Four stroke cycle, in order, is: intake stroke, compression stroke, power stroke, and exhaust
stroke.
(4) Cooling as follows:
(a) Engine operating heat is controlled by coolant.
(b) Lube oil is controlled by lube oil cooler.
(c) Air is cooled or heated as necessary by an aftercooler.
b. Capabilities and Features.
(1) Furnishes 1250 hp to drive the marine propellers.
(2) Can put out 2100 rpm (maximum).
(3) Engine idle speed is 725-775 rpm.
(4) Has both remote and local controls.
1-8. Location and Description of Major Components. FIG. 1-1 shows views of each side of the engine with
the locations of major components indicated. Refer to FIG. 1-1 and the reference number key below for the
description of these components.
a. Turbocharger Group (1). Two turbine wheels, one located on the exhaust manifold on each side of
the engine.
b. Air Cleaner Group (2). Two filter canister and cover assemblies, located on the top of the engine.
c. Air Intake Manifold Group (3). Intake air distribution piping, located on both sides of the engine.
d.
Thermostat Housing/Water Transfer Tube Group (4). Thermostat and water distribution piping,
located on the front of the engine behind the water filters.
1-2
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