The "'Atar 101E "'added a " zeroth " compressor stage, raising the overall pressure ratio to 4.8 : 1 and the thrust to.
32.
As with any heat engine, fuel efficiency is strongly related to the compression ratio, so there is very strong financial need to improve the compressor stages beyond these sorts of ratios.
33.
A "'mixed flow compressor "', or "'diagonal compressor "', combines axial and radial components to produce a diagonal airflow compressor stage.
34.
The first engine, its development designation being BOl . 1 ( Bristol Olympus 1 ), had six LP compressor stages and eight HP stages, each driven by a single-stage turbine.
35.
In an effort to keep the fuel efficiency of the engine similar to existing piston engine, Price used a combination of low-compression axial compressor stages feeding a high-compression reciprocating compressor.
36.
Early design featured a smaller 40-inch fan, no booster, one more high-pressure compressor stage, one low-pressure turbine stage less and a lower 4.5 bypass ratio.
37.
The IIG included the Astafan's characteristic variable-pitch fan, installed in front of an Astazou XVI core ( comprising two axial compressor stages preceding a centrifugal compressor on a common shaft ).
38.
They set about building a version of the inner portion of the Griffith engine, known as "'Anne "', consisting of the hub and eight compressor stages without the outer turbine portions.
39.
GE will improve the fan module and the high pressure compressor stage-1 blisk in the GE-90-115 turbofan, as well as reduce clearances between the tips of the turbine blades and the shroud during cruise.
40.
Developments of the engine included the 003C, which raised thrust to, and the 003D, which raised it to, which added one extra compressor stage beyond the seven of the earlier designs, and an extra turbine stage.
