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How to Design and Construct Your Very Own Airplane Home Flight Construction Book 6 eBook Erich Hartfield

Download As PDF : How to Design and Construct Your Very Own Airplane Home Flight Construction Book 6 eBook Erich Hartfield

When an · airplane is to be designed, there are certain
imposed elements on the basis of which it is necessary to
conduct the study of the other various elements of the
design in order to obtain the best possible characteristics.
Airplanes can be divided into two main classes war airplanes
and mercantile airplanes.
In the former, those qualities are essentially desired which
increase their war efficiency, as for instance high speed,
great climbing power, more or less great cruising radius,
possibility of carrying given military loads (arms, munitions,
bombs, etc.), good visibility, facility in installing
armament, etc.
For mercantile airplanes, on the contrary, while the speed
has the same great importance a high climbing power is
not an essential condition; but the possibility of transporting
heavy useful loads and great quantities of gasoline and
oil, in order to effectuate long journeys without stops,
assumes a capital importance.
Whatever type is to be designed, the general criterions
do not vary. Usually the designer can select the type of
engine from a more or less vast series; often though, the
type of motor is imposed and that naturally limits the
fields of possibility.
Rather than exposing the abstract criterion, it is more
interesting to develop summarily in this and the following
chapters, the general outline of a project of a given type
of airplane, making general remarks which are applicable
to each design as it appears. In order to fix this idea,
let us suppose that we wish to study a fast airplane to be
used for sport races.