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Applied aeronautics; the airplane - Beeldbibliotheek

Applied aeronautics; the airplane - Beeldbibliotheek

Applied aeronautics; the airplane - Beeldbibliotheek

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—20 APPLIED AERONAUTICSFig. 9Dcrice for ntea.siiriiu/ coin ituratirc air pressures on upper andlower surfaees of an inclined planeometer N tli rough <strong>the</strong> rubber tube T. Wheu <strong>the</strong> blower is started <strong>the</strong> uiauometerM shows suetiou at <strong>the</strong> poiut O on <strong>the</strong> ui»i)er side of <strong>the</strong> i)lane audN shows pressure on <strong>the</strong> under side of tlie phine. In o<strong>the</strong>r words, <strong>the</strong>plane is not only bh)wn up, but itis sucked up as well.This is very effectively illustrated by a still simpler experiment.Fii>'. 10 sho^^•s; <strong>the</strong> plane AB of heavy cardboard to which is fastened alight strip of paper at <strong>the</strong> ptunt A and left free at <strong>the</strong> point C. When<strong>the</strong> plane is placed in a wind blowing in <strong>the</strong> direction of <strong>the</strong> arrows <strong>the</strong>paper is seen to be drawn up to <strong>the</strong> position AC a>\ay from <strong>the</strong> i)lane AB.Fi(j. 10Hhon-i)i

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