An investigation into the Class 31 No. 1 - End leading overheating problem during February 1975 (TM-AERO-7)

This memorandum reports on the work undertaken by the Aerodynamics Section concerning the Class 31 engine coolant overheating problem. The work showed that the performance of the cooling fan (and its ducting) was inadequate in covering the working-range encountered as its characteristic did not have sufficient margin in reserve to...