. The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion: forming a complete course of mechanical, engineering, and architectural drawing . for this purpose,the concentric internal and external circles are described with thedetermined radii: the first is then to be divided into 48 equalparts, and radii are drawn through each point of division, as indi-cated in Plate XXXVI.; on each of these, outward from theinternal circle, is marked off a distance equal to a little more thanhalf the depth of the buckets, say -12 m., to indicate the bottomsof th
. The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion: forming a complete course of mechanical, engineering, and architectural drawing . for this purpose,the concentric internal and external circles are described with thedetermined radii: the first is then to be divided into 48 equalparts, and radii are drawn through each point of division, as indi-cated in Plate XXXVI.; on each of these, outward from theinternal circle, is marked off a distance equal to a little more thanhalf the depth of the buckets, say -12 m., to indicate the bottomsof the buckets. The water-wheel, when constructed in this manner, may give off 70 or 80 per cent, of the absolute force of the fall of water. Now this force, expressed in horses-power, is equal to— 140 X 4-56 — =8-Ol horses-power. Deducting 5 or G per cent, at the most, for the friction ofwater-wheel shaft in its bearings, we may still calculate, withcertainty, that the power utilized and transmitted by this wheelwill be equal to 74 or 75 per cent., or 8-51 X 75 = 6-38 horses-power. The number of revolutions which this wheel should make perminute is— Practical Draughtsman Practical Draughtsman. Plate 35.
Size: 1910px × 1308px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectdecorativearts, booksubjectdrawing
