Research on Low‐Drag Cowlings: An Account of Development Work Carried Out by the Bristol Company During the Past Ten Years

THE fact that ring cowling is approved for use with the current series of Mercury and Pegasus engines appears a suitable occasion for a resumé of the important development work carried out by the Bristol Company in connection with the application of drag‐reducing cowlings to their engines and a programme of work which has included a long series of single cylinder experiments, wind tunnel research and full scale flight tests.