. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . r this matter night afternight, and watching the delicate and sen-sitive movement of the sheets and stay-bolts and the difference in the action ofthe flexible and rigid bolts, everyone wasgreatly impressed with the superiority ofthe flexible bolt as a means of reducingthe probable stresses that the severalparts of the boiler are called upon tosustain. This is a purely personal mat-ter that is shared by all who have been indicative andnot absence ofany data uponwhich to estimate
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . r this matter night afternight, and watching the delicate and sen-sitive movement of the sheets and stay-bolts and the difference in the action ofthe flexible and rigid bolts, everyone wasgreatly impressed with the superiority ofthe flexible bolt as a means of reducingthe probable stresses that the severalparts of the boiler are called upon tosustain. This is a purely personal mat-ter that is shared by all who have been indicative andnot absence ofany data uponwhich to estimatethe probablemovement andbuckling of thesheets made aredesigning of ^the apparatusnecessary, andthe use of boil-ers with a mixedassortment ofstaybolts in thesecond case, gaveresults thatwould probablybe greatly modi-fied were boilerswith complete in-stallations to beused. But thereis this indication, that the boiler will expand and the stay-bolts deflect if they have a chance, andthat this chance is much greater with aflexible bolt than it is with a rigid has already been intimated, the dif-. Maximum Deflection Rigid St-iybolt .0483 in.; Maximum Deflection Flexible Staybolt .0658 OF STAYBOLTS NO. 3, TOP ROW BACK; WOOTTEN BOILERS, DELAWARE & HUDSON CO. impression left by the test is that theNNootten firebox is much more rigid thanthe wide firebox with the radial stayswhen rigidly stayed, and that if it wereto be given a complete installation of present during the progress of the work,;ind it has been driven home in a man-ner that is more than convincing, it isdemonstrative of the desirability of flexi-bility in boiler construction November, 1919 RAILWAY AND LOCOMOTIVE ENGINEERING 329 Metallurgy in the Manufacture of High Speed Steel The aim of the manufacturer of highspeed steel is to make a uniform metalthat will best meet the requirements ofthe average machine shop on generalwork, and at the same time allow thewidest variation in heat treatment togive desir
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