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MARINE REVIEW. | ov Test of the Steamer Madagascar. Conducted by Henry Penton of the Frontier Iron Works. The Madgascar is a wooden screw freight steamer, and is one of a pair, built in 1894 by Capt. Jas. Davidson at West Bay City, Mich., which are alike in all respects. She went into commission in August, 1894. The boilers and machinery were furnished by the Frontier Iron Works of Detroit, Mich., who sublet the boilers to Wickes Bros., of Saginaw, Mich. Some form of forced or assisted draft being required, that known as the "Howden system" was selected, and the apparatus therefor was furnished and fitted by the Dry Dock Engine Works of Detroit, Mich. Leading particulars of the hull and machinery are as follows: Hull, length 257 feet over all beam, 37 feet depth, 14 feet register tonnage, I,202 tons displacement, 3,287.2 tons at 14 feet 9 inches draft. The engine is triple expansion, of the usual vertical inverted type, with cylinders 16, 25 and 42 inches diameter, and 34 inches stroke. 'The high pressure is placed in the middle, the intermediate forward and the low pressure aft. The high pressure and intermediate cylinders are fitted Propeller see segrs ee utes 11 feet diameter, 13 feet pitch > Mai botlers_ 2 Ps ¥? 12 feet 3 inches diameter, 12 feet long Burnaces; twos... 4. 42 inches diameter, with separate . - combustion chambers Number of tubes_-__-____ 314 Mabectdiametenrs. 29s 2% inches Grate surface =4+__1ets 42 square feet Heating surface... 2 1893 " ' Ratio heating to grate Sutiace. 22a cee 45 The fan for supplying air to the furnaces is located in engine room and is driven by a vertical non-condensing engine 6 inches by 6 inches. Other auxiliaries, for which steam was used during these tests, were a duplex service pump 6 inches by 4 inches by 6 inches and a steering engine forward. It being considered desirable to learn something of the steamer's per- formance, she was stopped at Detroit on her way down on Oct. 26, 1894, and the necessary apparatus placed on board. Itis regretted that time could not be spared to make the tests more complete, but various reasons connected with the handling of cargoes caused so much delay in Lake Erie ports that the trials had to be cut short. Consequently only the leading CARDS No. 72. CARDS No. 3. CARDS No. 8. VACUUM 24 IN. STEAM 150. VACUUM 22% IN. VACUUM 23 IN. STEAM 155. STEAM 155. 1.P. REC. 45. REV. 90. P !. P. REC. 55. REV, 90. 1. P. REC. 65. REV., 94. L.P. REC. 6. H.P. VALVE TRAVEL, 2/6 1N. L. P. REC., 10. H.P. VALVE TRAVEL 3%;1!N. L. P. REC. 12. H. P. VALVE TRAVEL 41N. ats W.P -- 80 Se ee eee Meee ai fe ; torts ee ee 5 t pe Sot Se Renae eee eo Scien ak _ 1S =a Ss ee ea eons Ce thas ---------"} ' we MRP 18:40 Bs e roy M.P %2,.24 ; ee ee ee ee ' 4 ms ae vA oe ie ne ea ee HP 243.94 sa hat a WP. 234.5 | es eee ee \ " Y } ee H.R. 220-63 S022 " x I WA axe is i ' ut teen ore oT ace ee Faas melee f gee tes A eI eR a a ha Ee Nal kN NST her ee ne a tA Oe lm soe a I Leder -- 2 tt eae ~---- eek ia | ~-/ 1. NE me ech ea ee engp relma == Pere of { ---- SS Se SSS Se ama" _! (Mises Sm rT na lg pea le ea gr aerosol » oN a ae Vales aye) Soe 8 Rane aa BS Sie Paine ole faa c + Dany Nae On ee @ ' i eal Fi at i ee supe ete ee eae I oe | ---- Peo Saas ee ' ee ee eee a f ; eee tp. 286.5 soe } RG +e eee ee. 5 | ' "nt M.P 31-04 Se 1 Mea Ba} 22ST E RST ee eee | =. 5 ie ee = bo RE i OEE Ee a sce 1P4 236.05 ey x ee: mM P. 28 oe i ras A t aX 4 \ ie ~ U x Wor Ne ay oe Sno er NE es as eee eee t é HP 212.56 ny te ee eee YS fos se ese rehSe one Soa ee Se etme ' Jen ed pee (ae nae a cele ci am ee ee eine wan nr = ee a a a ~-----, (pesca a ms. 1 =e % IRS -- -"' 1 eras ; 1 BS Ne See Wipe oes ea Peak) pe at le ee wh Sou woe? citiOmums se wel ' es j= Messy (EB aah: ae ' ~ = - ' \ el Sore ! \ = ent INO) An ee | \ ss a | . a ' Sa ais \ { -- - / ' ier 4 ' >< Me tarts | ee. \ a rec : ! Tice "7 \ ! pee . ! ! ae Se ' ! Bane wae | ' eae a | \ _- . \ \ soe ee | I ne M.P. AV.G4 SS os OES Tes ! s 'S t ' & a ' ae ~ MP \2.46 Sei ee 1 - Mie lpt4 ox ' a HP. 390.13) ~~. | a z a 1 ' , TIS } ' 7 ~s | ; ay E Sh 1 u . Baz we i A Se hors Sea le }?. 266.09 Yo U PaO oN ! : ro Tq " \: 1 a arly ' F | IK a { e vet (oA i] ses i if y is val 1/7 iy ' 7D wa \! 1 N Bigsea ' j { be Se Steed ins jar a2 eee Fines 4 x i Se a a a eal = ph ps che ame ett 7 Wy ty " Prey AU) \ fh * ; ad TOTAL +P 100 RLELRRED MP 32.7: Nesed gap aiditeudieas | kL eee Nee eee pe oe Haag Ss Gobet Forte eae Siege -4 f oeeepe ee ee yl ~ Se ene stiri ty ----=--- REFERRED MP 40.12 Sn htt Se ee wee ee eee REFERRTUD MRP 33.1 VOTAL FR ONS | features are summarized, but it is believed that while incomplete, they are fairly accurate. On the first trial the steamer was alone between Cleveland and Ashtabula, and on the second trial she towed a loaded consort. The cargoes, on Soo canal draft, consisted of 1,913 gross tons of ore for the steamer and 1,700 gross tons for thgconsort; total 3,613 gross or 4,046.5 nettons. There was no log on boad and accurate tests of speed could not be made, but from time taken while passing certain points the average TOTAL rR 815.59 with single ported piston valves, the low pressure: cylinder has a double ported slide valve. The high pressure valve is operated by Joy's valve gear, has a travel of 4 inches and is arranged for a maximum cut-off of 78 per cent. The other two are operated by link gear, have 4% inches travel and a maximum cut-off of 72 per cent. There are no valve chests between the cylinders, and none of the cylinders are steam jacketed. 'The framing of the engine consists of four wrought iron struts or columns on the front or starboard side, and at the back of three cast iron columns forked at the lower end and carrying the crosshead slides. The cranks are three in number, set 120° apart, the sequence being H P. L, P., and I. P. The air pump, bilge and cold water pumps are worked by a beam, from the intermediate pressure cross-head. The feed pump is indepen- dent, of Dean Brothers make, and {takes its suction from hot well of air pump. The ratios of cylinders are as I, 2.447, 6.89. Other dimen- sions are: Sut See tee eee eee 9% inches diameter Cran le iS 6 5 oi poe gers i 9% inches long Mainjournals.__..--_--. Qos! * 15 ie S Piston gds 2. ee Siete $ Connecting rods -------- 7 feet 6 inches long, ratio 2.64 PAS NAOT 3 2 Bi nce 20 inches diameter, 12 inches stroke Feed pump, duplex- ---- 6 inches by 4 inches by 6 inches is placed at 11.25 miles per hour for the first test, the steamer being with- out consort, and 9 miles for the second, when she was towing the consort. It is believed that these are actually within the mark. Both tests were made under ordinary working conditions. The engines were designed to be worked ordinarily with a high pressure cut-off of from 65 to 75 percent. While cards No. 3 showa remarkably equal distribution of work, test No. 2 (Cards No. 8) seem to show the greater economy of working triple engines at later cut-offs. : An interesting feature is a comparison of the cost of moving the steamer's cargo alone at a speed of 114 miles per hour with that of moving the combined cargoes at 9 miles per hour, and shows plainly what speed costs. The cost of coal is taken at $2.25 per ton. The first test was commenced after cleaning fires and continued for three hours. The second commenced after cleaning fires and continued [CONTINUED ON PAGE 12.]