UHBR engines require novel advanced nacelles, close coupled to the wing, for an optimum installed low drag powerplant, outside the current design experience. The Project objective is to apply multi-objective optimisation techniques to advanced 3-D nacelle systems in combination with the installed flow field. This requires utilising of the latest CFD techniques to predict installed nacelle thrust & drag enhancements, to define novel nacelle candidate designs for test. Wind Tunnel Testing of installed UHBR cycle powered nacelles featuring a low pressure ratio fan and novel power systems to accurately simulate representative exhaust jets is required; - validating the predicted benefit(s), using novel measurement techniques. Please refer to the full topic descriptions document published in this call.