Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

498 _______________________________ Molesworth's pocket-book High-pkessube Engines. Diameter of cylinder 1 _ in inches .. ■ ■ J ~ Stroke ......... = Depth of piston ., = Diameter of piston-rod = Thickness of metal of | _ cylinder in inches J ” Thickness of ribs ofi cylinder .. ., J “ Length of ports = L = Area of port ... r. Width of exhaust .. Diameter of slide-) valve spindle ..) Length of connecting! = 8troke 2 rod ..............J Diameter of connect-) _ qg p ing rod at end .. J ~ ‘ „ ,, f =-Arth inch per foot of Swell of ditto .. length ofr(ä. Diameter of crank-pin = • 23 D. Length of ditto .. = "34 D. Diam. of crank-shaft = ’ 33 D. D. 2 D to 21D. • 25 D. • 15 D. • 06 D +‘2. •3 thickness or metal. •7D. • 057 area of cylinder. = 1 • 5 width of steam-port. = "09 D. Nominal Horse-power of High-pbessuke Engines. Nominal horse-power .. 5 10 15 20 30 40 Diam. of cylinder in ins. 8 11 13 15 18 20 Stroke in inches .. .. _______ 18 24 29 33 40 45 50 22 50