I'm not quite sure that the OP has been satisfactorily answered. The 'Anderson' quote is about propeller-driven airplanes, for which many introductory textbooks make the simplifying assumption that P-sfc is constant (fuel flow is proportional to power). Similarly, for jet-powered airplanes, as already clearly explained by Rivet Gun, the usual simplifying assumption is that T-sfc is constant (fuel flow is proportional to thrust). In that case minimum fuel flow in level flight (max. endurance) is minimum thrust for level flight, i.e. max L/D. Right?
regards,
HN39
Last edited by HazelNuts39; 16th October 2010 at 08:31.