L.p. Compressors Parts

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Part Number
NSN
NIIN
01696 Sleeve Bearing
002882437
10A1872678 Sleeve Bearing
002878627
11-B1377 Sleeve Bearing
010647563
1313N Sleeve Bearing
005298679
13572N Sleeve Bearing
003440276
1872678 Sleeve Bearing
002878627
1DD185 Sleeve Bearing
006617616
2-095-003-450 Sleeve Bearing
004774825
2-095-003-454 Sleeve Bearing
004774825
2811PC53 Sleeve Bearing
002882437
2A608 Sleeve Bearing
002167864
30221725 Sleeve Bearing
002167864
3120006617616 Sleeve Bearing
006617616
3W75307 Sleeve Bearing
002167864
436452 Sleeve Bearing
002878627
5150311 Sleeve Bearing
006617616
72930 Sleeve Bearing
005967773
72960PC14 Sleeve Bearing
005967773
7C Sleeve Bearing
001254668
93-1872678 Sleeve Bearing
002878627
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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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