L.p. Compressors Parts

(Page 21) End item NSN parts page 21 of 64
Part Number
NSN
NIIN
028-07431 O-ring
000200186
028-07443 O-ring
001675173
028-07453 O-ring
001727189
028-07524 O-ring
000200067
028-07759 O-ring
008045695
028-07848 O-ring
002518839
028-08258A Cloth Insert Solid Rubber Sheet
001790052
028-08718 V Belt
004847472
028-09306 O-ring
010053213
028-09377 O-ring
001660996
028-09378 O-ring
005822133
028-09378-000 O-ring
005822133
028-11955 V Belt
004847472
02824-44 Pressure Switch
004486930
02833 Flat Washer
000806004
02837 O-ring
005822855
028507 Pipe To Tube Elbow
002216215
0287 9037 O-ring
001661071
Page: 21 ...

L.p. Compressors

Picture of L.p. Compressors

Jet engines and other gas turbine engines are often uprated by adding a zero-stage, sometimes written '0' stage,

At a given core size, adding a stage to the front of the compressor not only increases the cycle overall pressure ratio, but increases the core mass flow. A further uprating may be done by adding another stage in front of the previously-added zero stage, in which case the new one may be known as a zero-zero stage.

A comparison with other ways of uprating an existing engine without drastically redesigning the engine shows for a particular case, eg the Rolls-Royce/SNECMA M45H, the thrust could have been increased by 25% with a zero-staged l-p compressor or 10% with either an improved HP turbine or with water injection.

Zero-staging is also combined with other modifications to provide increased thrust or lower turbine temperature. It may be required for an existing aircraft weight increase, or for a new application, as shown by the following examples.

A 15-stage Rolls-Royce Avon powered the Lightning F.1. A zero-stage, together with a new turbine, was added (total 16 stages) for the Caravelle III. A zero-zero stage was added (total 17 stages) for the Caravelle VI.

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