Military aeroplanes, simplified, enlarged; an explanatory consideration of their characteristics, performances, construction, maintenance, and operation, specifically arranged for the use of aviators and students . ° At the low angle 1°, we find by referring to the first chart thatKl=.00085. Supplying values of S and L, equal to the weight, weobtain W= Kl S V^= 1800= .00085 x 335 x V^ from which it develops that, V2= 6320, and V= miles per 99 In the same way reference to the chart of aerofoil characteristicsshows that at 12°, Kl= .0027, so that L= 1800= .0027 X 335 x V from which
Military aeroplanes, simplified, enlarged; an explanatory consideration of their characteristics, performances, construction, maintenance, and operation, specifically arranged for the use of aviators and students . ° At the low angle 1°, we find by referring to the first chart thatKl=.00085. Supplying values of S and L, equal to the weight, weobtain W= Kl S V^= 1800= .00085 x 335 x V^ from which it develops that, V2= 6320, and V= miles per 99 In the same way reference to the chart of aerofoil characteristicsshows that at 12°, Kl= .0027, so that L= 1800= .0027 X 335 x V from which we obtain, V= miles per hour. Since the required lifting power and area of the wing surfacesare fixed, it is hardly necessary to emphasize that, for any inclination,there is only one speed at which horizontal flight is attained with thegiven load. Each angle has its particular corresponding speed. So that in gradually increasing the angle of incidence of the aero-plane from 1° to 12°, the Lift coefficient has become greater, thereby sogreatly increasing the Lifting capacity of the machine, that speednecessary for horizontal flight near sea level has gradually reducedfrom to miles per Vol Pique, Nose Downâ m. p. h. Vol Cabre, Tail Downâ m. p. h. SPEED RANGE It is important to emphasize here that the aeroplane requiringmuch less power to fly at the slower speeds, in order to keep flying hori-zontally at any particular angle of incidence, the power must be suitablythrottled. Any excess of power will cause the aeroplane to climb, andany lack of power, to sink. All of which emphasizes the fact that foreach given angle of incidence, and a fixed weight, there is one andonly one corresponding speed of horizontal flight. So the speeds at various other angles of incidence are determined,the high speed condition corresponding to low angle of incidence, andthe low speed condition to high angle of incidence. The aviator by tiltinghis machine, and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectairplanes, bookyear19
