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September, 1926 lows the most advanced engineering lines and a number of important re- finements and improvements not cus- tomary in engines of this size have been adopted. The company’s engi- neering staff spent over five years in research work preparing for the de- sign of this particular model under instructions from the management, that the engine would not be placed on the market until it was proved be- yond a doubt to be under critical test in the very best possible working order. Its lines are especially neat and symmetrical and compactness is combined with strength and rigidity. A one-piece water box construction is used providing maximum rigidity fore and aft. The two crank cases and the water box are held together by 16 through steel tie bolts from the MARINE REVIEW is made of cast iron heavily ribbed. The top half of the crank case secure- ly bolted to the bottom half is also of cast iron. There are large hand holes for inspection of main bearings and connecting rod boxes. The water box of cast iron in a one-piece cast- ing is flanged and bolted to the top half of the crank case. Six charcoal iron cylinder liners are inserted in this casting. There is ample water space for cooling the cylinders. The cylinder liners are made of close grained charcoal iron, machined and ground to mirror smoothness. These liners can easily be removed. The cylinder heads made of close grained charcoal iron cast individu- ally and thoroughly water jacketed are secured to the water box by high carbon studs. There are six remova- 31 and ground. Rocker arms are of steel castings, bronze bushed, carry- ing hardened steel rollers and pins at each end. The crank shaft of high carbon steel is of built-up type, with one set of cams for go-ahead and one for astern. The cams are of carbon steel, drop forged and hard- ened. Reversing is accomplished by sliding the camshaft in a fore and aft direction. The camshaft is driven by spur spiral at the aft end of crank- shaft. There is a_ direct connected air compressor at the forward end driven from the main crankshaft. This com- pressor is of the three-stage progres- sive type, with inter-coolers between each stage and also an after-cooler. The cylinder is thoroughly water jacketed and removable plates are oy AT LEFT—PORT OR OPERATING SIDE OF THE NEW 800 H.P. WINTON DIESEL ENGINE. AT RIGHT—STARBOARD SIDE OF THE SAME ENGINE—COMPACTNESS AND bottom of the crank case to the top of the water box. These steel tie bolts take the firing stresses of the engine, and consequently no cast iron part is called upon to absorb any of these stresses. This engine is a four stroke cycle and has six cylinders of 16%-inch bore and 22-inch stroke. It develops 800- horsepower at 3800 revolutions per minute. The crank shaft is 10% inches in diameter and is made of open hearth steel subjected to rigid inspec- tion. Bearings and pins are ground and the entire shaft is machined all over. The shaft is double drilled for lubrication. Chrome vanadium steel forgings are used for the connecting rods, tubular in section and of six inches outside diameter. Detachable journal boxes of cast steel lined with the best high speed babbit, scraped to fit are bolted to the connecting rods with four steel bolts. There are nine main bearings in the bottom half crank case which ble valve cages in each cylinder head, two for exhaust, two for intake, one for injection, and one for air starting and relief valve. The exhaust and intake valves are identical. These valves are forged of special alloy steel, the head and stem being in- tegral. Pistons Of Special Alloy Pistons made of a special aluminum alloy called bu-nite are exceptionally long and are ground for their full length. Each piston is fitted with six compression rings and one oil seraper ring. The piston pin bear- ings are carried in the piston and are lubricated by pressure from the main oiling system. This type of construction gives a large bearing surface to the piston pins which is of vital importance as the piston pin bearings are the most _ severely stressed bearings in an engine. The piston pins are made of a special alloy steel, bored hollow, hardened NEA TNESS OF DESIGN ARE CHARACTERISTIC : fitted for cleaning the water space. The injection valve is of mushroom type opening inward and is of the simplest design. There is a_ six- plunger fuel pump and the fuel con- sumed by the engine cylinders is metered by a cut-off valve working on suction strokes of the pump plung- ers. This cut-off valve is in turn regulated by the governor which controls the engine’s speed. The governor is controlled by a hand lever and is of the fly-ball type spe- cially designed for and adapted to this engine. The governor is of rugged construction and runs in a bath of oil. It is of the over-speed type and cuts in when the engine speed reaches a pre-determined fixed point. A reciprocating type, gear driven, circulating water pump of ample ca- pacity to cool the engine is fitted. This pump has Kinghorn valves. The lubricating oil pump is of two-cylin- (Continued on Page 52)