Page
SHIPBUILDERS, SHIP REPAIRERS, BOILER MAKERS,
FORGE MASTERS,
"OXY-ACETYLENÉ AND
ELECTRIC WELDERS.
MECHANICAL AND
ELECTRICAL
ENGINEERS."
-DRY DOCK
Length 787 Feet.
Length on Blocks 750 Feet.
THE TAIKOO DOCKYARD & ENGINEERING COMPANY`
KONG, LIMITED.
OF HONG KONG,
Wireless CALS,
Salvage Tug **
TAIKOO"
V.P.C.N. 600 METER.
Depth od Centre of € SII (H.W.O.S.T.) 34 ft. 8 Ins.
-THREE SLIPWAYS.—
Capable of Handling Ships Up to 1,030 Tons Displacement. Electric Crane at Sen Wall, Capable of Lifting 100 Tons at, 70 Feet Radius.
BUTTERFIELD & SWIRE, Agents,
HONG KONG, CHINA & JAPAN.
TEL ADDRESS: "TamooDOCE. Boxo KoNo.
TELEPHONE: 80211
CALL FLAG, "NUMERAL ONE" OVER "ANS, PINWANT
HONG KONG DAILY PRESS, SATURDAY, JANUARY 27, 1934.
ENGINEERING AND BUILDING
THE MOTOR TRAWLER “ALA”
Comparatively Successful Innovation
The first of a fleet of 12 motor trawlers, under construction by Messrs. Richards Ironworks, Lim- ited. Crown Works, Lowestoft, for the East Anglian Ice and Cold Storage Company, Limited, the Ala was taken out to sea from Lowestoft an Baturday. November 18, to test the general performance of the vessel, which embodies many innovations in Ashing practice. Unfortunately.. the weather conditions "prevailing were such that it was not possible to obtain "exact measured data, nor to carry out trials of the trawl gear, but a. speed of 81 knots was shown by the log and, during the three hours' run, the engine worked Very smoothly, causing very little vibration in any part of the ship.
Designed By Mr. S. 9. O. Rie- hards for North Sea trawling, the Ala has the advantage of a spacious deck and good sea-going characteristics for her length, which is 75 ft. The other princi- pal dimensions are: beam. 20 ft. 6, in; depth amidships, 9 ft. 6 in.; and draught art, 10 ft. Balls can the be used on twb masts, but main propelling equipment con- sists of a Ruston-Lister marine oit engine developing 150 brake
リ
Shanks SANITARY WARE
& CO LTD
BARRHEAD-SCOTLAND
MODERN SANITARY
EARTHENWARE APPLIANCES IN WHITE & COLOUR
THE JARDINE ENGINEERING CORPORATION, LTD,
14, PEDDER ST. HỒNG KÔNG.
(Incorporated under the Companies" Ordinances of Hongkong)
SHAMEEN,
SOLE ACENTS
CANTON,
For Constructural Work of Every
Description
Use Green Island Cement
TWO REFLEX MOD
TYPE ROTARY KILNS HAVING AN OVER ALL
LENGTH OF 254 FEET. THESE KILNS ARE USED TO
MANUFACTURE GREEN ISLAND CEMENT,
Issued by the
GREEN ISLAND CEMENT CO., LTD.
2ND FLOOK
EXCHANGE BUILDING
horse-power. The forward" part of the trawler is divided into two Store rooms and a large, fish,hold. The latter is completely Insulated, in order that the requisite tema peratures may be maintained with the minimum expenditure of ice. Accommodation is afforded aft for the crew of six hands and for the skipper.
.
CENTURY OLD CONTROL
Marine Governors
"Marine Governors" was the Boject of a paper delivered by Mr. MacNicoli, joint managing director of Messrs. Cockburns, Ltd., Cardonald, at a meeting in Glasgow of the Glasgow and West of Scotland Association of Foré man Engineers and Draughtsmen.. Mr. MacNicoll pointed out that the function of a marine governor Wes quite different from that called for on land engines. In the latter the governor had to meet arose load that variations every day in the ordinary course of working.
If vessels were always running in still water there really would be no need for a governor at all, because there would obviously no power than that which wuold.be required for a change of speed.. Thus many types of feed or water pumps had no governors. It was only in rough weather when the propeller or propellers might be, lifted partially or wholly out of the water that the power must be reduced or cut off altogether. In theory, therefore... It would only be necessary to have a gov- ernor controlling for the position of the propeller, relative, to its amount of immersion. A class of governor of this sort was known as an anticipating governor, and the steam was shut off or could be shut off before there was any increase of revolution due to loss of load. The control was effect- ed through difference of pressure head That type of governor might also operate through a pendulum or moving weight rol- ling along a bar.
"
5 Cylinders The main engine has five cylin- ders, of 11-in. bore and 144-in. stroke. It works On the four- stroke cycle and runs at a mor- mal speed of 235 r.p.m., develop- ing 150 brake horse-power. Start- ing is effected by air pressure, and the Ruston system of airless infection is used for the fuel. "Al- though totally enclosed, accessi bilty of all working parts is af- forded through easily detachable covers. The air-starting bottles "are placed beside the after-bulk- head of the engine-room, and their charging and discharging is ad easy matter, for the man in charge of the engine controls by reason of the discharge being taken from a valve chest close to his normal post. Am auxiliary compressor is provided, but the bottles can also be alled from one of the engine cylinders, which is so arranged that the fuel supply can be cut off from it at any time for this purpose. A centri fugal-type governor is furnished and operates through the speed control. A large range of work- ing speeds is possible under gov- ernor control extending from the full value down to a very low tow- ing speed, which can be maintain- All ed indefinitely when fishing. the engine controls are grouped together, and may be managed either In the engine-room or through transmission from the wheel-house. They are marked by simplicity, that for the speed Change consisting of a lever work- ing on a notched quadrant, while reversing is effected through an easily operated hand wheel. Throughout the engine forced lu- brication is used. The oil is drawn from the fanks by a gear- type pump and passed throughed at length the various types of
an Auto-Klean strainer and cool- er before delivery. A scavenge mmp. of "larger capacity, draws off the all from the crank-case, keeping the latter always dry," and discharges into the general supply tank. The lubrication is thus kept free from troubles due to weather conditions and the rake of the engines. The bilge "and circulation pumps are mount- ed at the forward end of the en- gine and run at half of its speed. Above. them there is a 1-kW, 110-volt direct-current generator, driven from the main shaft. Elec- tric supply when in port is ob- tained from a 7-brake horse- power.. single-cylinder Rustori Lister oll, engine, which drives a generator similar to that on the main engine, as well as a single- stage compressor and a general service pump. These are mount- ed in tandem on a combined bed, with a direct drive to the gen-. erator and friction élutches for the cther units.
Speed Governors The other class of governor for marine engines was the speed
operated by inertla, governor. and might be of the revolving or..
The reciprocating weight type. anticipating governor had been alted to many steamers with re- ciprocating engines and possibly some motor vessels, but not, so far as the author knew, to any turbine vessels.
Bath classes of governors dated back to the 'Afties of last cen- tury. Mr. MacNicoll then describ
governors and made reference to the fittings on some of the first turbine vessels.
EVERLASTING PLATING
Scientist's Discovery: Metals'
"Liquid" Surface
י,
Lighter Alloys For Aircraft, The "surface of polished metal is "liquid." This fact, established Tor the first time by a London professor, is likely to lead to im- portant advances in the:
Protection of iron and steel against corrosion;
Manufacture of permanently stainless-plating for motor cars;
and
Use of lighter alloys in aircraft. which will yet withstand the destructive action of rian and atmosphere.
All these should result from the parallel discovery that the "liquid" layer of
polished. surface is apparently essential to the perfect plating of one metal upon another. Its func- "tion is to join metal and plating
in a united whole.
The professor is Captain G. L Finch, the former Mount Everest climber, of the Imperial College of Science and Technology, South Kensington. He has been
.. assisted in his present work by two young scientists, Dr. A. G. Quarrell and Mr. J. S. Roebuck.
The first turbine vessel built Ly the Fairfield Shipbuilding and Engineering Company was the steam yacht Narcissus. The tur- bines were also constructed by the firm to the designs of' Par- 'sins. The author, then just out of his apprenticeship, was engag- ed on the blading and brazing.of these turbines, which had Proell governors operating a single beat steam-controlled valve through the intermediary of steam relay. From then onwards Proell or other types of governors were generally employed. operating. through a relay, either by steam, the tripping of a weight, or mov- ing a lever on to revolving eccen- tries which gave the necessary stroke to shut the throttle.
Coming to more recent times, Mr. MacNicoll said it had been stated that the geared turbines never raced in heavy weather. Since the introduction, of the As- pinall-Cockburn controls it had been proved beyond doubt that
Admiralty and Welsh this did take place.
Coal
Efforts, on the part of the "Back to Coal Movement” in South Wales, to induce the Ad- mntralty to return" to coal as a fuel for the Navy were again disappointed when the First Lord of the Admiralty, Sir Bolton Eyres Monsell, stated that the Admiralty could not accept the views put before them, as the cast of the conversion of the Navy to coal fuel would amount to a considerable sum If the Navy used coal exclusively, its consumption would only represent. about half of one per cent of the national output of coal. The Navy formerly used, Welsh coal exclusively, and if using Welsh .coal now. would require about 1,000.000 tons per annum, or about 3 per cent of the Welsh output employing constantly over 3,000 miners besides other workers.-- Engineering.
WORKING MODEL OF WATER SOFTENER
One case was 'a large liner on the North Atlantic passenger trade. The chief engineer during Heavy weather noticed that the steam chart showed that the steam was being shut off át re-. gular periods. He could not un- derstand this until he thought of -the governors. During subsequent heavy weather he watched the emergency "valves and found that they were regularly closing in and Then opening out again. Another case was a large passenger vessel on the Pacific trade, and al- though the manoeuvring valves were closed in to 60 per cent. of full power governing was being effected.
ENGINE FOR IRAQ PIPE LINE
Harland and Wolff's Big Contract
Messrs. Harland and
Wolft,
· Ltd.have now completed at their Finnieston Engine Works, Glas- gow, the order for 15 Diésel en- gines for use in the five statloris on the section of the pipe line. stretching from Haditha to Haifa over 400 miles through probably the most desolate section of the schemes Pic
Mesers, Williahy Boby and Com- pany, Limited, Brookheld House,' $3-64, -Brbok-strebt) Loddon, W., have rebendly presented to the Three engines will be installed, Defence Museum, South Kensing In each station, which is com ton, London, Wale work- piete with its own cooling, elec ing model prsta automatic tric generating, air starting, and apparatus of that Simplex lime-bollar equipment. Each angine is soda water softeners. On dress ing a push button water flows and sets the foodel working: we understand that the Museum omelets have complimented", the firm, on the excellent appearance and operation of the model.
capable of developing at sea level. 600 bhp at 30 meat ex
The engines have a deat ternal appearance very largely achieved by the total enclosure of all the working parta, including vulva gear.
of
Surprise Discovery
His discovery that the surface polished metal is "quid" confirms a theory put forward many years ago by the late Bir George Beilby. Director of" Fuel Research for the Government during the War and is the result of three seconds of sur- prised watching.
Professor Finch was examin- ing the arrival on the surface of polished copper of a minute film of zinc crystals, literally bolled over to their new quarters
of an.
by the rapid heating electric wire in a vacuum.
He was watching the shape of the deposited crystals, as he bad done marty times before. through the pattern produced by a bead of electrons fälling on the surface of the metal.
The pattern duly arrived-a score of more of bright circles on a fluorescent screen. But much to the professor's surprise it rapidly weakened, and within three seconds had completely disappeared.
Professor Finch persevered. A second, a third and a. fourth film were tolled over on to the copper. Each disappeared, but each lasted longer than the last, until the twelfth film stood fast.
"The Real Proof "What it means,** Professor Finch" told & representative of the "Morning Post" "is that the incoming crystals of zinc were being slowly dissolved in the liquid layer of the copper-just as snow-akes falling on water rest for a moment on the surface and then disappear.
That this should happen at all is presumptive evidence that the top layer of the polished metal was liquid. But the real- proof is that we got our electron pattern when the zinc" crystals were on top but not either before or after. No pattern means no crystals that is what we call the soild liquid' state.
liquid copper had already dissolved. all the zinc which it was capable. of holding. This is supported. by the fact that when the sing bombardment was turned on to pcllshed iron, the zinc layer stood fast at only the second attempt zinc is less soluble in fron that copper, and so we should expect the liquid layer of fron to be more quickly. saturated."
"That the twelfth layer of crystals should stand fast means. simply that by that time the
Professor Finch then turned to the practical side of his work. He has made similar films on "both polished "and" unpolished:
metal
He ands that whereas the Alms on unpolished metal, which stand fast at the first attempt. can be easily rubbed of the filma on polished metal never be completely removed and, in at least some cases; Rive efficient protection against corrosion.
can
Professor Finch showed me a small piece of iron with a zinc. coating less than a millionth of been: an inch think. It had placed in brine, of sea strength for a whole night and afterwards exposed for a month to the air.
Where the iron was protected its surface was as bright as if it had just been polished, but the unprotected part was beavily » rusted.
The result is similar to that achieved by galvanising. But the coating dah be done at ordinary temperatures, the pro- tective layer is infinitely thinner, and its appearance very much more attractivé.
· Professor Finch has "ex- perimented with Alms of aliver on copper, platinimh on zinc, and zinc on platinum, and as the "result of his initial success a systematic investigation is to be undertaken,
·Professor Finch expressed the
"or opinion that his method vacuum plating would be capable of industrial application, where its efficiency had been proved.
"I could also" he said, "gay. definitely to any firm engaged In ordinary electrical plating that their plating would be most effective if the metal were first polished-diwnys provided that the "liquid layer was not etched away by the acid in the plating process."
T
"GLASGOW · LOCOMOTIVE
CONTRACT
"In addition to the order for new wagons lately placed by the London Midland and Scottish Railway Company, contracts have been given out for 100 locomo- tives, which latter orders are a special addition to the company's ordinary building programme for 1934. The North British Locomo- tive Company, Limited, Spring- burn, Glasgow, has secured the contract to build 50 of these. They will be passenger locoino- tives of the 4-6-0 superheater three-cylinder type, and will mean employment for a large number of men for some months, when construction is commenced in the near future.
METAL WINDOWS
MANUFACTURER:
MADE IN HONGKONG
FROM
IMPORTED
BRITISH MATERIAL
95%
BRITISH.
THETAI YING STEEL WINDOW MFG. CO.
TILAPHONE: 27482.
OFFICE 89/85, CHUN YONG STREET. FACTORY-NORTH-POINT, HONG KONG.
Cantieri Riuniti Dell'Adriatico
TRIESTE MONFALCONE
Shipbuilders, forge masters, electrical engineers, makers of the most up to date types of a roplanes and sexplanes.
Tenders and designs submitted on request. CENEBAL AGENCY FOR HONG KONG AND SOUTH CHINA PRINCE'S BUILDING. Bib FLOOR.