Inhaltsangabe
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ... order that this angle of incidence i„ may be included between the practical limits 0-05 and 0-20, the resultant R, must itself be included between the result ants R0.05 and Ro2o situated respectively, according to formula (24) CCO-Ui, at the distance 0-02AB and O08AB from the resultant R0) that is, in the present example, 2 m/m. and 8 m/m. Thus to each position of the centre of gravity there corresponds one angle of incidence, and only one; and in order that this angle may be confined within practical limits the centre of gravity must be placed in the shaded portion of Fig. 46, that is to say, between two points distant less than-J of the length AB from each other.1 52. The tail--The elevator. The foregoing considerations show that for flying at different angles of incidence without altering its centre of gravity, an aeroplane must consist of at least two planes, one fixed and the other movable. Let two such planes be taken, as in Fig. 47, which are at a small angle x to one another and a short distance apart. Now when the air strikes the leading plane AB at the angle i it exerts upon it the pressure R1=K1S1Vai (S1=the surface, Kj=the total resistance, lift, and drift of the plane). The second plane is struck at the angle i--x, and taking the symbols S2 and K2 as representing respectively its surface and its total resistance, the pressure R2, which it sustains, equals K2S2V2 (i--x). To achieve stability, the product of each of the pressures and its distance from the centre of gravity, in other words, the moment of each pressure in relation to this point, must be the same:2 Ri X Gfifi = R2 X Gg2, or KVH x Gg,=K2S2V-x) x Gg2. 1 This conclusion conveys some idea of the sensitiveness of a device whereby the angle of incidence of a single flat plane might...
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Reseña del editor
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ... order that this angle of incidence i„ may be included between the practical limits 0-05 and 0-20, the resultant R, must itself be included between the result ants R0.05 and Ro2o situated respectively, according to formula (24) CCO-Ui, at the distance 0-02AB and O08AB from the resultant R0) that is, in the present example, 2 m/m. and 8 m/m. Thus to each position of the centre of gravity there corresponds one angle of incidence, and only one; and in order that this angle may be confined within practical limits the centre of gravity must be placed in the shaded portion of Fig. 46, that is to say, between two points distant less than-J of the length AB from each other.1 52. The tail--The elevator. The foregoing considerations show that for flying at different angles of incidence without altering its centre of gravity, an aeroplane must consist of at least two planes, one fixed and the other movable. Let two such planes be taken, as in Fig. 47, which are at a small angle x to one another and a short distance apart. Now when the air strikes the leading plane AB at the angle i it exerts upon it the pressure R1=K1S1Vai (S1=the surface, Kj=the total resistance, lift, and drift of the plane). The second plane is struck at the angle i--x, and taking the symbols S2 and K2 as representing respectively its surface and its total resistance, the pressure R2, which it sustains, equals K2S2V2 (i--x). To achieve stability, the product of each of the pressures and its distance from the centre of gravity, in other words, the moment of each pressure in relation to this point, must be the same:2 Ri X Gfifi = R2 X Gg2, or KVH x Gg,=K2S2V-x) x Gg2. 1 This conclusion conveys some idea of the sensitiveness of a device whereby the angle of incidence of a single flat plane might...
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