. Official proceedings . lbe glad to hear from them. ^IR. J. COLE: I would like to ask Mr. Xeft if he does notthink that in these larger locomotives that are equipped with com-bustion chambers the lessening of flue troubles is not jdue to agreat extent to the shortening of the flues? ]\IR. XEFF : If I imderstand your question correctly thecondition is a combustion chamber with short flues. ]\IR. COLE: Most of the engines that have combustionchambers formed out of the back flue sheet are generally longboiler engines, and in the same size of locomotive without thecombustion chamber they would ha
. Official proceedings . lbe glad to hear from them. ^IR. J. COLE: I would like to ask Mr. Xeft if he does notthink that in these larger locomotives that are equipped with com-bustion chambers the lessening of flue troubles is not jdue to agreat extent to the shortening of the flues? ]\IR. XEFF : If I imderstand your question correctly thecondition is a combustion chamber with short flues. ]\IR. COLE: Most of the engines that have combustionchambers formed out of the back flue sheet are generally longboiler engines, and in the same size of locomotive without thecombustion chamber they would have in the neighborhood of 21or 22 fliies. \\hen you make a combustion chamber out of theback flue sheet that shortens up the flue to between 18 and a shorter flue, with the experience I have had I have foundwe have less flue trouble. MR. XEFF: You are entirely right about that. A com-bustion chamber engine is a good deal lighter on flue trouble thana long flue engine with ordinary back flue sheet. ]jut the figures. Discussion—The Rt-lation of the Brick Arch. 213 given on reduction of flue troubles are comparative figures onsimilar engines with long flues and the ordinary flue sheets. I donot think you can make as much showing from an arch in a com-bustion chamber engine in the matter of reduction of flue trou-bles as you can in the more common type of locomotive boiler. VICE-PRESIDEXT: Has any on else anything to sug-gest? If not, would you like to add anything more to what youhave said, ]\Ir. Xeft? MR. NEFF: There are a few points I would like to speakon. I was much interested in what Air. Redding and Mr. Rich-ardson said in regard to freight engines that did not make a goodshowing. I am not familiar with the conditions under whichthose engines operate or what kind of coal you use, but I amsomewhat familiar with the design of the firebox. Those are ten-wheel and consolidated engines ? ,MR. REDDIXG: Yes. AIR. NEFF: The wide firebox ten-wheel engines and agreat many wid
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