Figure 7-19.--Main machinery arrangement for foilborne and hullborne propulsion systems.
Figure 7-20.--Foilborne propulsion system.
MAIN PROPULSION (FOILBORNE)
propulsion is created by a two-stage water jet pump
SYSTEM
powered by a gas turbine engine. The propulsion thrust
occurs as seawater is pumped through the water jets and
The foilborne propulsion system provides the PHM
expelled through a nozzle at the stern. The reactive force
with speed and stability. The basic components of the
resulting from the acceleration and expulsion of the
foilborne propulsion system are shown in figure 7-20.
The foilborne power plant supplies the thrust required
seawater drives the ship forward. The main advantage
for takeoff and foilborne operations. Foilborne
of this system is its speed and efficiency in driving the
7-21
