. The aviation pocket-book for 1918; a compendium of modern practice and a collection of useful notes, formulae, rules, tables and data relating to aeronautics . 0* 10° 30* 50° 70° Pressure on an Inclined Aerofoil (Lilienthal 90° 24 AIR PRESSURE AND RESISTANCE [l>iv. I Eiffel i-xjjeriniento(l A\itli a eurved ])lane of oamlter —-, span 90 cm., chord lo cm., giving an aspect ratio of (i. Tljo rurve belowshoNvs bis O* 20° 40° 60° 80 W Angle of inclination lo air current. Pressure on an Inclined Aerofoil (Eiffel). The maximum lift and total pressure both occur Avhen the leadingedge of
. The aviation pocket-book for 1918; a compendium of modern practice and a collection of useful notes, formulae, rules, tables and data relating to aeronautics . 0* 10° 30* 50° 70° Pressure on an Inclined Aerofoil (Lilienthal 90° 24 AIR PRESSURE AND RESISTANCE [l>iv. I Eiffel i-xjjeriniento(l A\itli a eurved ])lane of oamlter —-, span 90 cm., chord lo cm., giving an aspect ratio of (i. Tljo rurve belowshoNvs bis O* 20° 40° 60° 80 W Angle of inclination lo air current. Pressure on an Inclined Aerofoil (Eiffel). The maximum lift and total pressure both occur Avhen the leadingedge of the plane is tangential to the air current. Centre of Pressure on Curved Surfaces.—Sellers has determinedthe ])Osition of tl\e centre of pressure at varying angles for fourditiereut shapes of aenjfoil, The aerofoils used were G by P2in, r>iv PRESSURE ON CURVED SURFACES 25 I CircuUr Arc. Camber f2. 2 Circuhr Arc Camber i*. 3. Aerofoit curved for the front thirdand fht for remniiider Cambtrm. 4 HaII vertex of Pur&boh CamOtrr/i Shapes of Aerofoils in Sellers Experiments. Xo difference was found in the positif^n of the centre of pressurefor different velocities of the air current. Wilbur Wright has referred in general terms to the movementof the centre of pressure on an aerofoil as follows: In deeplycurved surfaces the centre of pressure at 90 is near the centre ofthe surface, l)ut moves forward as the angle
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectaeronautics, bookyear
