Research to evaluate and analyse compressor and turbine aerodynamics, external heat transfer, combustion aerothermodynamics, aero-engine emissions, noise prediction and reduction, aero-engine controls and dynamic simulation. Also includes system integration aspects including intakes and propulsion/lift nozzles relating to platforms and weapons and related structural design aspects. Also includes work on torpedo thermal engine designs. Also includes improved testing techniques to determine engine performance parameters. Also includes work to improve the resistance of gas turbines to effects of sand/salt ingestion.