SIMPSON, STRICKLAND ft Co.. Ltd., Dartmouth * 



CHAPTER II 



\V.\Tkk '! BoiLSfcft. 



General Description of Different Types of Boiler* principal 



types of boilers in u-i f>i launch purposes are. taking ihnn in order of 



:ilal. 2nd the \rrlit.il. 3t! : (tonzooul 



istsof a shell, having a furnace at one end and a funnel at the 



\\ith tube-s i .iMMtM tinn thrin. The most usual arrangement is shown 



in block I ; A U-inn the furnace, It the tuU-s an : mnel. This type 



: hough form- lias now to a great extent 



>nes on account of the fact that 

 bulky am) h< its power, and is in consetiuencc only admis 



- no great ol.jr, t. It is. h some as being 



1 to use excessively bad i the hands of unskilled men. 



A boiler of somewhat similar design, but \\ith th<- tubes returning o\> 



: for mat in the larger sizes. The 2nd type 



UTII p: successful in the form of oar 



" Kindlon's ' pairnt. of which we givr an illustration. A is the furnace, B the 



tubes, C the funnrl ; the gases passing din-ct up through the tulcs. There 



smokeb. .ingcd so that the whole of the tubes are 



below the water lm<-. This Uiler has the great advantage that it has a 



> the space it stands on, and it 



consetpicntly makes sit.mi \\eli \vith n.iiiiral or nearly natural draft, h 



does not space to be left for sweeping tubes. In consequence of 



M space it does not pnmc. and from the arrangement of the 



mud .TV thoroughly cleaned inside, the lower tubeplate 



accessible- \- \ t\pe has only recently come 



tuik'uishetl irom the ot having the 



contained in the tuln-s instead of the flame passing through them and the 



It has been for some time used with great success for 



torpedo and other high speed work. In order to get a boiler suitable to 



ok the Thorneycrofi as a basis but entirely remodelled 



it as shown in the mrlosed woodcut of our Strickland patent. This 



-tram drum d>) and a water drum mmunicating 



with each other by steam generating tubes (F) and downtake tubes (Gj, 



the furnace and funnel Iwing A and C as before. When in action steam is 



formed in the tubes (F) and passes up to the top drum, can h it a 



^ current of water. This returns to the bottom drums by the 



