. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . e boiler. It is tlicsudden tearing away of a large area incase of failure of the ordinary crownsheet, that causes a violent explosionwith disastrous results. In the sectionalfirebox the tearing away of a large areais impossible, as the rupture cannot ex-tend from one section to the next. The arched sectional form of cotstruction provides for expansion and contraction due to variations in temperatureEach section is free to expand or con-tract without producing excessive localstresses or transm
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . e boiler. It is tlicsudden tearing away of a large area incase of failure of the ordinary crownsheet, that causes a violent explosionwith disastrous results. In the sectionalfirebox the tearing away of a large areais impossible, as the rupture cannot ex-tend from one section to the next. The arched sectional form of cotstruction provides for expansion and contraction due to variations in temperatureEach section is free to expand or con-tract without producing excessive localstresses or transmitting undue stress toadjacent sections. The entire structureis more or less flexible, and while expan-sion and contraction occur, the form ofeach section allows it to expand withoutstraining the next one, thus relieving anystresses induced by temperature varia-tions. The holes for horizontal circulationthrough the radial staysheets are of suf-ficient area to allow the free inflow ofwater over what we may call the crownsheet as fast as it is evaporated. Theenlarged space within the individual sec-. SECTIONAL FIREBOX. tions encourages rapid vertical circulationand the more rapid this circulation is thegreater the scouring action of the wateragainst the hot metal. The corrugated surface of the fireboxtends to cause a turlnilent motion of thehot gases, and the whirling motion thus
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Keywords: ., bookcentury1900, bookdecade1900, bookidrailwaylocom, bookyear1901
