Reduction of helicopter parasite drag

Robert D. Harrington
Aug 1954

A reduction in helicopter parasite drag is possible but not profitable except in those cases where high speed and long range are primary requirements. For some of the factors causing drag, reduction in parasite-drag area may result in increased weight whereas, in other cases, it does not. The final design, however, must be a compromise between the reduction of drag and the increase in weight.

An Adobe Acrobat (PDF) file of the entire report: