A report on the progress made to date of the aerodynamic research sections recent activities concerning air inlet louvre design on HST (TM-AERO-4)

The engine-cooling radiator louvres built originally for HST were a Derby-designed set made at Crewe Works. (See Fig. 1). This design fulfilled the cooling airflow requirements under all operating conditions, but was expensive due to the high machining and fabricating cost incurred during manufacture. (The cost of each of these...