Document 91Y1J938jv8bZ0v2z35zXMpMq

28,540 HOURS' OPERATION... WEAR LESS THAN.OO!" SWA,N, |0IT0 StPTtMUt 1951 I5T.IUSHED 1111 Ppmrer 3200 Psi in 1923 i^aStK0w*--rS!1"7i. Tht* 0lllJnc C po*/* Ho. I rig wort loktri on l. I*** *o/fh f Fotce, Ko*m, fngla WbHcotod wtiH tiiM Uns Qg' Jf** -- ooo | (ft# fcunavi Ition Unc Oil mtU*. Stickle Drilling Company, Tulsa, Oklahoma, has long been getting outstanding performance from Diesels lubricated with Tixaro Ursa Oil. Typicol are the three Caterpillar Diesels operating the No. 2 drilling rig. These were taken down for inspection after 28,540 hours of operation, and the following report gives the story: "We found that Texaco Ursa Oil had kept these engines ideally clean. Measured wear wjjj under one-thousandth of an inch. Since then, the engines have been back in oper ation foe over 10,000 additional hours without any down time." You can get similar fine performance by using the rec- ommended member of the famous Texaco Ursa Oil - -- a romfilele line of lubricating oils for Diesel, gu &4 dual-fuel engines. Whatever the type, site or speed of engines, their operating conditions or fuel used, there b? Texaco Ursa Oil to assure dean, efficient performance minimum maintenance costs and fuel consumption. *"| Texaco Ursa Oil scries is approved by leading enj"fl builders and preferred by operators everywhere. T A Texaco Lubrication Engineer will gladly give you f* I information. Just call the nearest of the more than 2,0i' Texaco Distributing Plants in the 48 States, or write Thj Texas Company, 155 East 42nd Street, New York TEXACO URSA OILS RfrtuiRTv y&aRS aCO, in the spring of 1923, Power re* J. ceived a phone call from a stranger named Mark Ben- Siion. Ha had just landed In New York from England and Eva* encamped at the Commodore HotcL He wanted to see an editor. I was then an esculent editor, end was and superheating to 788 F; expansion to 200 psi in a tiny one-stage impulse turbine running at 20,000 to 25,000 rpm; reheating to 662 F; final expansion to 0.5 psi in 7000-rpni gear-connected turbine. These were paper plans, not operating result*. All pressures are absolute. gient over to see what it was all about Now let's move on 13 years to March 12, 1936. 1 was Benson pulled out a big sheaf of diagrams, tables and jEeikulations--all relating to his radical proposal to gen- erste steam at the critical pressure of 3200 psi in a oncethrough boiler, in Berlin interviewing Dr Gleichman, chief engineer of the big Siemens-Schuckerlwerke. Dr Gleichman kidded me about his bald head--said it was my fault It oeems that Siemens first heard o! the Benson boiler through the Power articles. Later, they bought the world patent right* . -With h permission 1 photostated all the papers and from the English Electric Co. Gleichman said it took-him .* weited out (he two long articles published in Power, years to get the unit working properly. M a result he lost May 22 end 29, 1923. These excited much Interest ell a lot of sleep end tore out a lot of hair. Hence the bald around the world. Digests appeared in the leading e>* head--which was my faulL (inuring journal* of England, Germany end Russia. After 1929, however. Dr Cleichman continued, it was With the cooperation of the English Electric Co, Benson a different story. He got the unit under control, but oper j ffts aiming primarily to provide 1500-pti steam for tur ating well below the critical pressure anywhere from bine operation without paying the price of the heavy 1200 psi to 2500 psi, depending on the load. Further boiler drum required for that pressure. He reasoned that details may be found on page 246 of May, 1936 Power feedwater pumped through boiler tubes at pressures lightly above 3200 psi would turn quietly into steam at die point where the fluid reached the critical temperature ol 706 F. There would be no boiling--no steam bubbles `to disengage, so no drum would be needed. if anybody is Interested. In time, the Benson bolter came into wide use in Ger many--also In Russia under the name Remain. We don't know that it was ever commercially operated at critical pressure, but it did operate without a drum, which made The 3200-pti steam would be throttled (o 1500 psi and it attractive to steel-poor Germany just before the second superheated before going to the high-pressure turbine. World War. At that time about 170 units were running y Presumably, the very moderate steam temperature* on land and sea. then permissible, and the very small capacity of the proPosed pilot plant (1000 kw) made it uneconomical to operate the turbine at 3200 psi, despite the obvious power *tte In pumping feedwater at more than 3200 psi to produce turbine throttle steam at 1500 psi. It's worth noting again that Benson's announced purpose wee merely to eliminate the costly high-pressure boiler drum. Under the technical limitations of bi* lime It doe* not appear that he planned to operate turbines at the criti cal pressure or higher, ft is a far ery from his ingenious Here are some of Benson's proposed conditions: boiler pioneer proposal to present plans for on ultra-high effi3200 psi (plus) and 730 F; throttling to 1500 pai ciency plant with a throttle pressure of 4500 psi.--pws %FOR All. DIESEL, GAS AND DUAL-FUEL ENGINES POWM SEMEMStl "'CJJ ^jown SIWIMStt IPS)