Military aeroplanes; an explanatory consideration of their characteristics, performances, construction, maintenance, and operation, for the use of aviators . advantages and disadvantagesenables the first essential step in the design of an aeroplane to be taken —?the choice of a wing section that will give the weight-lifting, strengthand speed combination desired. Examples of the application of curved section pressures are takenup in several instances in the consideration of aerofoils, and many ofthem are deduced from actual practice as applied in well known typesof aeroplanes. Summary. I. In f
Military aeroplanes; an explanatory consideration of their characteristics, performances, construction, maintenance, and operation, for the use of aviators . advantages and disadvantagesenables the first essential step in the design of an aeroplane to be taken —?the choice of a wing section that will give the weight-lifting, strengthand speed combination desired. Examples of the application of curved section pressures are takenup in several instances in the consideration of aerofoils, and many ofthem are deduced from actual practice as applied in well known typesof aeroplanes. Summary. I. In flat surfaces. The total pressure Pa is always normal to the section, andcan be resolved into. Lift = Pa Cos aDrift = Pa Sin a The center of pressure moves forward as the incidence isdecreased. II. In cambered surfaces. The total pressure Pi is not always normal to chord, andthe pressures on a cambered plane are, therefore, more easily ex-pressed as Lift = Kl S V^Drift = Kd S V- The center of pressure, on curved surfaces, moves forward up toa certain low angle where it reverses and moves raj^idly to the rear(except for reverse curved surfaces). 68. Photographs of air flow, sliowini; air drllt-ct ions, (diLained at tin- aulh()r> laiior-atory, b\ introducing rlKmicai smoke into the air stream.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectairplanes, bookyear19
