This chapter covers both uninstalled and installed engine performance. The aircraft performance engineers require installed thrust and fuel flow (FF) data to estimate aircraft performance. In most industries, aircraft performance engineers generate the installed engine performance using engine manufacturer‐supplied computer programs amenable to input of the various losses arising from taking engine bleed/off‐takes for aircraft systems and intake/nozzle losses.
Uninstalled gas‐turbine engine performances in non‐dimensional form are given in Sections 8.3–8.5. From the non‐dimensional engine data, matched engine installed performances are generated. These are validated against industry standard data. Performances are given in non‐dimensional form for the following types of engine (except the piston engine performance):