The Aeroplane HandbookArthur John Swinton |
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Common terms and phrases
aerial aerofoil aeroplane air speed indicator aircraft airscrew aneroid angle of incidence animal glue atmosphere axis bending biplane blade element Cable calculated cent centre of pressure chord coefficient coil courtesy of Messrs diagram diameter direction dope drag effect efficiency engine equation feet Five Figure Logarithmic flight flying force Frank Castle frequency ft./sec gauge given glue height inches increase inductance instrument length lift lift coefficient lift force load curve machine main plane maximum metres millimetres obtained oscillations oscillatory circuit P₁ P₂ paint patent permission to quote pilot pitch Pitot tube Pounds propeller quote these tables radius rate of climb ratio resistance rudder screw Shear shown in Fig side-slip spars spin square stability stalling standard density steel stress strut surface tables from Five tail temperature tensile thrust torque torsion V₁ valve velocity vertical wind wings wire
Popular passages
Page 57 - If the given number is greater than 1, make the characteristic of its logarithm one less than the number of figures to the left of the decimal point in the number.
Page 147 - ... that, in the interest of the public service, the particulars of the invention and of the manner in which it is to be performed should be kept secret.
Page 248 - Change of motion is proportional to the impressed force and takes place in the direction of the straight line in which the force acts.
Page 146 - Provided that a patentee may assign his patent for any place in or part of the United Kingdom, or Isle of Man, as effectually as if the patent were originally granted to extend to that place or part only.
Page 112 - This difference of pressure is as nearly as we can judge by experiment = '/£ pV1 (where p is the density of the air and V the speed of the machine), provided that the open end of the tube is well clear of wings, struts, fuselage, etc., and so is not affected by eddies and other disturbances. Now assuming this law, air speed indicators are graduated to read correctly, as I have said above, at a density of 1.221 kgm. per cubic metre, which we have taken as our standard density and called "unity.
Page 249 - The reaction of the stream of water acted upon by any propelling instrument is the product of three factors : the mass of a cubic foot of water ; the number of cubic feet of water acted on in a second ; and the velocity, in feet per second, impressed on that water by the propeller.
Page 73 - Zmr* is the sum ^ cf the products of the mass of each particle of the body by the square of its distance from the axis, Zmr* is culled the moment of inertia of the whole body around the axis and is commonly written I.
Page 116 - From the aneroid reading and the temperature observations at each height the density is obtained. The reading of the air speed indicator is then first corrected for instrumental errors by adding or subtracting the correction found by calibration tests over the cameras or speed course. This number is then again corrected for height by dividing by the square root of the density. The result should give the true air speed, subject, of course, to errors of observation. The numbers so obtained are plotted...
Page 116 - ... curve is then drawn through the points and the air speeds at standard heights of 3,000, 6,500, 10,000, 13,000, and 16,500 read off the curve. These heights are chosen because they correspond closely with 1, 2, 3, etc., kilometres. The indicated engine revolutions are also plotted against the standard heights, because these observations form a check on the reliability of the results; also, the ratio of speed to engine revolutions at different heights may give valuable information with regard to...
Page 91 - The wire shall be cylindrical and smooth and may show no evidence of scrapes, splints, cold shuts, rough tinning, or other defects not in accordance with best commercial practice. Tensile Test Samples for the tensile test shall be not less than 15 in. long and free from bends and kinks. In making tensile tests on aircraft wire, the distance between jaws of testing machine, with the sample in place and before test, shall be 10 in. The wire must not break at less than the amount specified in the accompanying...