o obtain the desired revolutions. The coefficient of traction pL must be selected accord- ing to ground conditions. It varies from about 0.02 for a smooth surface such as a concrete runway or a flight deck to as much as 0.30 for a sandy surface. In the absence of exact data, the following values… … V/nD for max/mum efficiency FiGlTRE 8.—Static thrust coeHicient FINAL NET ACCELERATING FORCE The final net accelerating foi'ce per nnit weight is defined by equation (4) .00 .03 ,04 .05 .06 .07 (4) Parasite drag coefficient, Cq^^ W W L Fi<:;i:nK 10 where is the thrust at tako-ofi' speed and BjL is…
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