Transcription of MODEL BOILERS - John-Tom Engine Plans
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MODEL BOILERS - John-Tom Engine Plans
MODEL BOILERS . A booklet devoted to the construction of Get stampings rather than castings, as the MODEL BOILERS may well open with a few first are more homogeneous, and therefore cautionary words, as the dangers connected can be somewhat lighter. with steam-raisers are very real; and though Flanging Boiler Ends MODEL -boiler explosions are fortunately rare, if they do occur they may be extremely To make a good job, a plate for an end should disastrous. be screwed to a circular block of hard wood (oak or boxwood), having an outside diameter Therefore the following warnings: less than the inside diameter of the boiler (1.) Do not use tins or thin sheet iron barrel by twice the thickness of the metal of for BOILERS . One cannot tell how far the end, and a rounded-off edge. The plate internal corrosion has gone. The scaling must be annealed by being heated to a dull of 1/100 inch of metal off a "tin" is red and dipped in cold water. The process obviously vastly more serious than the must be repeated should the hammering same diminution in the thickness of, make the copper stubborn.
MODEL BOILERS All joints exposed to the flames should be silver-soldered, and other joints as well if the working pressure is to exceed 50 lbs. to the square inch. Silver-soldering requires the use
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