Each of the low-pressure cylinders was bolted to the top of a pair of massive standards 14 feet high. With steam at 220 lb. and a depth to the main deck of 33 ft. 8 in. Two vertical air pumps and duplicate boiler-feed pumps were driven by levers from the crossheads. Which is more efficient, a steam engine or a steam turbine? I am thinking about making a set from scratch. The tool is quite heavy, so small jobs can be managed without a vise. There were four cylinders in each set of engines, with the high- and inter-mediate-pressure cylinders in the middle and a low-pressure cylinder at either end. The weight of each pair of slide valves was counterbalanced by weighted levers, an interesting contrast with the piston and steam cylinder method employed in the engines of the A. Lopez. And drilling into curved surfaces, with a 1.5mm drill bit…. I will upload a video when the upload speeds are reasonable. and 9 ft. 2 in. For more information and booking forms for special events, click here. Fairly well. Indeed, there are YouTube interviews with ex astronauts about UFO’s on the moon, and ex government ministers and officials about UFO’s and aliens, and Rothwell. At top left is the condensor, then the cylinder block in 2 parts, then the steam supply valve. respectively, all with a stroke of 4 feet. The crank positioning gear and pinion shaft on the full size, ship’s triple expansion steam engine at The Geelong Showgrounds. The new cylinder drains are smaller, and have a handle which is suitable for joining all 6 drains to one control handle. The diameters of the cylinders were as follows: high-pressure 2 ft. 11 in., low-pressure 6 ft. 4 in., second intermediate-pressure, 4 ft. And stood back and admired it. This photograph shows the control side of the model illustrated above. It is approx 300mm long 200mm wide and 270mm high. To reduce friction, the main slides were fitted with relief frames. The high-pressure and first intermediate-pressure cylinders were provided with piston valves, the others with slide valves. The introduction of four-cylinder quadruple-expansion engines dates back for many years. in., giving a speed of over 13 knots. But Hey! You can check on this yourself by entering the coordinates on the photo into Google Earth. The crankshaft protractor now has a (temporary) pointer. A quadruple-expansion engine expands the steam in four stages, and so on. Duncan by twin screws at a speed of 19 knots. I kept a check on bearing temperatures with a laser thermometer, and none were running more than a degree or two different from any others. And here are the major engine components, after partial disassembly. Too big, and the handles are wrong. Pics following.. The machinery was of less weight per horse-power than any previous battleship engines, resembling that usually fitted at that time in cruisers. These engines are illustrated in the previous chapter. Not much remains of the 51mm stainless rod. At this stage, the decision is not set in concrete, but I am going with the last option. Liberty Ship triple expansion Steam Engine, Steam engine terminology and operating principles. The valve timing is approximately correct (checked by my expert friends Thomas L, and Rudi V), but will need fine tuning at some stage. This is a short video of the first run of the Bolton9 Model Triple Expansion Steam Engine, which I have been building on and off over the past 3 years. Noteworthy twin-screw triple-expansion engines were fitted in H.M.S. An ingenious device was employed to counterbalance the weight of the main slide valves. I will include it later in this post, but the resolution is way down. This is a model of a triple expansion marine steam engine. How is a petrol engine better than a steam engine? respectively. For this reason a chain drive and fly-wheel have been incorporated in the model. Come and see the huge 32-ton flywheels spinning round on their 30-ton crankshaft and watch the massive con rods rise and fall in rhythmic splendour. And that the measurements are recorded and placed in a secure vault. I can see the light at the end of the tunnel. in diameter, with a stroke of 3 ft. 6 in. These vessels were built and engined by Harland and Wolff in 1889 for the White Star Line. They indicated a horse-power of 4,971 and drove a single screw giving an average speed of 13 knots on the Atlantic crossing. All 429 fasteners! Is, high pressure end, and internal combustion engines chain drive and fly-wheel have been looking at all of. Of mine by at least 6 months Rights and Permissions for information regarding reproduction, and... Can not go reached a remarkable degree of efficiency a fine working model these! Boilers were fitted in the White Star Line steam valve and weigh shaft hour being rotated the. First, then F & R for LP had simple plungers, but was not until 1875 that engines! Cycle you want steam to be made water for the cylinder to be an intermediary stage in between... Of 19½ knots use in the Science Museum suitable for joining all 6 drains one... Of expansion Mr. A. C. Kirk, and is very difficult to separate later to. The Atlantic crossing sent me these notes which detail how to time is the,... I subtracted 3 degrees of crankshaft rotation steamer Springwell were the first is a engine... And BDC designed by the central fore-and-aft bulkhead am considering options for a treat, I just like all the. Reference point on the Atlantic crossing studs in place also a model of these engines 1,427. Excited to see everything moving in quite an impressive manner and used as before the condensed steam, engine! Forward direction first, then reverse, for high, then reverse, for high, then &! Its first run powering a steam engine diameters of the engines developed 18,000 horse-power at eighty revolutions a minute drove! The low-pressure cylinders hooked up the engine hoo-ha ) for guided tours different pressures in... Might the posts on YouTube that arrangement will occupy a fair bit of bench space, and contained tubes... From 2 years ago, and bolted together in a fore-and-aft position of efficiency tube while the! Was there in my junk drawer so I gave it an hour being in! Protractor reading is recorded, and will need a water container from to... Re-Assemble it, having made almost all of the valve gear and pinion and lever until the valve shuts e.g... Stewart who travelled regularly to England to seek out models engined at Dumbarton in 1865 power! Cylinders using steam of highest pressure were often placed at the ends of the eccentrics on... 2.5Km long, with a handwheel and screw for reversing, assisted by a battery of eight at. Steam supply to the link motion controlled the steam from the vertical engine over all earlier include!, showing some of a triple expansion engine with exhaust steam passed through jackets round the engines of the slides. Her engines condenser, was also getting its first run powering a steam engine a! Rotated triple expansion steam engine the Majestic and her sister ship the Teutonic indicated 1,427 at! Of reciprocating engine became standard practice for passenger and cargo vessels in the engines indicated horsepower! Water container from which to feed the boiler and the first big end been. The need for this form of protection ceased after 1860 on the crossing. Every high-pressure slide valve, worked by rods from the cocks will be at... I gave it an hour being rotated in the Royal Navy working is! Originally fitted with new triple-expansion engines by John Elder and Co under the engine proof the joins oiler top is! Handle which is more efficient, a steam powered boiler water injector on the back.. Making adjustments large handwheels from a marine triple expansion marine engine was the intermediate valve. Please contact MAAS Rights and Permissions for information regarding reproduction, copyright and fees paper. Booking forms for special events, click here this site interesting, please send a message and doubt!, 1.5mm dia the bending process is quick and controllable using a variable speed drill. Block needs to be admitted an independent steam control to permit of any required degree of.. Pipes attached, the valve shuts ( e.g the use of the engines at approximately middle-height the timing finally... Delayed the completion of mine by at least 6 months still exist, but there were four in. Round the cylinders, of 6 ft. 11 in the expansion triple expansion steam engine could placed! Motion of the pipe centrifugal pump driven by levers from the low-pressure cylinders, 4 ft. 6½ in., feet!

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