Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 325
The inside surfaces 12 of the tubes equal -^ ^ ^-— 611.8 sq. ft, 12 354 ROGERS DRAWING AND DESIGN. Allowing for the heating surface, one-half the sur-face of the shell, and all of the inside surfaces ofthe tubes, we have 131.4 + 6i 1.8 = 743.2 sq. ft. H. = 743.2 sq. ft. We have already found the… … equal to 19.16 sq. ft. Dividing the heating surfaceby the grate surface, we are to get, according to theconditions given in the problem, the ratio of 2)7- ^^ — 38.7, or very nearly as required.19.16 the value of a commercial horse power, adopted bythe A. S. M. E. Different boilers will…
Mechanical drawing · Machine design
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