. Treatise on marine and naval architecture, or, Theory and practice blended in ship building. Illustrated with more than 50 engravings . a remark seems necessary here : inrelation to the strength of the ribbandwhen on the bilge, there should be agreat amount of strength in the timberitself, inasmuch as no amount of fast-ening that could be put into the rib-band and bilge way, would compensatefor tjiis when the bilge way inclinesout; the ribband must be sufficient-ly strong in itself to keep the wayinboard ; hence we say the ribbandshould be of oak, and thick, such aswill not readily split; to
. Treatise on marine and naval architecture, or, Theory and practice blended in ship building. Illustrated with more than 50 engravings . a remark seems necessary here : inrelation to the strength of the ribbandwhen on the bilge, there should be agreat amount of strength in the timberitself, inasmuch as no amount of fast-ening that could be put into the rib-band and bilge way, would compensatefor tjiis when the bilge way inclinesout; the ribband must be sufficient-ly strong in itself to keep the wayinboard ; hence we say the ribbandshould be of oak, and thick, such aswill not readily split; to prevent which,fastening should be put through it edge-wise; there is no liability to splitting offthe ribband when outside, inasmuch asthe shores come against it above theface of the ground way, which ef-fectually prevents any accident from .this source. There is little danger tobe apprehended from the starting ofthe ribband when either mode is adopt-ed, provided the vessel is lively on theways, and starts as soon or before theblocks are all removed; the custom ofholding the vessel until all the blocare out, is wrong; when thekeel. 01 v« MARINE AND NAVAL ARCHITECTURE. 397 blocks are removed, they are taken outaft first, and the shores at the same time,or in advancee of the work as it pro-gresses from aft ; and before two-thirdsof the blocks are out, the shores shouldbe all out ; the vessel hangs aft as theways take her weight, and often cantsa number of the blocks. If, however,she is not inclined to go when theblocks are all out, a battering ram orscrew may be used ; if a screw isplaced against the end of the bilge way,there may be a strain put on it beforethe blocks are all out, and as the re-moving of the blocks advances towardscompletion, the strain may be increasedon the screw; sometimes when a ves-sel is launched on tallow after beingpacked up several days, it is foundvery difficult to start her, and it hasoften occurred that the vessel of neces-sity was blocked and shor
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Keywords: ., bo, bookcentury1800, bookdecade1850, booksubjectnavalarchitecture
