Excerpt from The Problem of Flight: A Text-Book of Aerial Engineering

IN view of the fact that we now appear to be on the verge of a practical solution to this classic problem of flight, I beg to submit to the engineering profession an epitome of the knowledge at present available on the subject. In the mathematical considera tion I have adopted the principle, well established in engineering practice, of omitting those factors which appear to be unimportant. The formulae are therefore engineering formulae in the strict sense of the word, i.e. They are not the result of a deep mathematical analysis which it is, in the majority of cases, almost impossible to apply.

I sincerely h0pe that the rules, in conjunction 'with practical experiments, will prove useful, both before and after the new and more fortunate Icarus has flown from London to Manchester.

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