Shipbuilding in iron and steel / a practical treatise . . the pintle at the heelis merely intendedto steady it. Thefour aftermost verti-cal frames support ahorizontal platform,marked 0 O in , on which theweight of the rudderis taken. Upon thisplatform is fixed anarrangement of fric-Figi96- i|i!L___-J ^ tion rollers which is shown in the sketch just referred to, and is illustrated on a largerscale in Figs. 196 and 197. From the elevation of the rudder-headgiven in Fig. 196 it will be seen that a circular forging, Q, is securedto the platform 0 O, and forms a table, upon the upper bevilled
Shipbuilding in iron and steel / a practical treatise . . the pintle at the heelis merely intendedto steady it. Thefour aftermost verti-cal frames support ahorizontal platform,marked 0 O in , on which theweight of the rudderis taken. Upon thisplatform is fixed anarrangement of fric-Figi96- i|i!L___-J ^ tion rollers which is shown in the sketch just referred to, and is illustrated on a largerscale in Figs. 196 and 197. From the elevation of the rudder-headgiven in Fig. 196 it will be seen that a circular forging, Q, is securedto the platform 0 O, and forms a table, upon the upper bevilledsurface of which the friction rollers rest. These rollers are of brassand are conical frusta in shape, being secured in the cone band Ras shown in Fig. 197. The rudder-head is of uniform diameter asfar up as the upper side of R, but from that point, and throughoutthe depth of the forging S, the diameter is reduced to 11 inches,thus foiToing a shoulder of \ inch at the upper and lo^^ er edges ofS. By means of this shoulder all the weight of the rudder is. Chap. XIII. Rtidders. 255
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Keywords: ., bookcentury1800, bookdecade1860, bookpublisherlondo, bookyear1869
