Figure 4-8.-DDG-51 start air system (simplified).
with fewer valves. Instead of using five valves, the
As we indicated earlier, the start air systems we have
DDG-51 start air system does the same job with only
just discussed are found on the CG-47, DD-963, and
two valves. The console controls are also much
air DDG-993 class ships. In the following paragraphs,
simpler in design. At the DDG-51 console, you will
will point out the differences found on the two
have only one of two choices to maketo use HP air or
remaining systems installed on the DDG-51 and
bleed air to start the engine.
FFG-7 class ships.
In the DDG-51 start air system, another design
DDG-51 CLASS SHIPS. The start air system on
difference is that the HP-to-LP air reducing station
the DDG-51 class ships shares some basic similarities
outlet that is 75 psig. In the DDG-51 system, an
with the systems we have already described. If you
orifice pack is not installed because additional air
pressure reduction is simply not necessary.
see the start air system for the DDG-51 class ships
performs the same functions as the DD-963 system