The Practical Engineer for Marine and Stationary Engineers or Firemen or Machinists

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 edition. Excerpt: ...exhaust valves of an engine travel the slowest? Ans. The valves travel the slowest during the time the ports are either closed or wide open. The exact point when the valve of a slide-valve engine travels the slowest is when the eccentric is either in its extreme forward or extreme backward position. In the case of many other engines, like the Corliss for example, the intervening mechanism may change the effect of the eccentric. Ques. No. 313. What necessary changes would have to be made to change a non-condensing engine to a condensing engine? Ans. To change any non-condensing engine over to a condensing engine, there will have to be a condenser of some kind; if a marine plant I should say a surface or keel condenser, but if a stationary plant I would prefer a jet condenser. In a marine plant you would have to have air and circulating pumps, if' you put in a surface condenser; if a keel condenser, you would not have to have a circulating pump, as the keel condenser is attached to the bottom of vessel, and as the vessel moves through the water it causes the condenser to have cool water all the time, but in case you are working the engine hard. and the vessel is not moving through the water, you don't have a very good circulation only in case of going astern; then the propeller will cause the water to circulate the same as when moving through the water. Ques. No. 314. Why is a compound engine more economical than a simple engine, steam pressure and ratio the same? Ans. Smaller parts, and less condensation. Ques. No. 315. If you were at sea, and your high-pressure engine became disabled beyond repair, how would you proceed? Ans. Disconnect high-pressure engine, and run with after engine or engines. Ques. No. 316. Name the...