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BR 53-003 2-6-8-0 Steam Locomotive Hello Everyone, As previously mentioned here you can see my new BR locomotive The BR 53-003 and especially the cooling water tender couldn’t miss in my BR collection! I decided with my kids to call this locomotive with a friendly nickname "German Big-Boy” because of its huge size and for the structure with double pair of drive wheels and pistons. Historical & technical data Circulate a steam locomotive in countries where water is scarce has always been extremely problematic. One solution was to recover part of the water used, so the Deutsche Reichsbahn decided to experience the condensing tender for military purposes. The technical principle was to recover the exhaust steam, separate from the oil, and conveys it to the tender which had enough space to hold the radiators capacitors. The outside air was aspirated by special fans through the capacitors. The fans were driven by a turbo generator driven by the exhaust steam. Once cooled, the steam is transformed into water and was collected in a tank. Some pumps pushing back the water in the boiler of the locomotive. The vapor loss was in the order of about 10%: this created a closed circuit for 90%. of steam, that in this way was used several times. During the II World War DR German locomotives with cooling fans system were used in Soviet Union, where the water supply was difficult. Moreover, from a strictly military point of view, the elimination of the plume of white steam made locomotives less visible. A great distances could be covered without intermediate water supply, it was possible to cover up to 600 km instead of the usual 150-200 km. By contrast, the complexity of the system, the easy formation of limestone deposits and the problems related to the freezing have limited the use. Despite the satisfactory results, this technique was stopped because of the costs of maintenance and sensitivity of the equipment. Since March I have been involved in the creation of this European goliath, and the most difficult part to be implemented was the tender where the space was really limited to insert the dual battery, the IR receiver, the engine, the fans and the switches hidden in little coal section. The front bogie of the tender has three axles and they are too far away to take corner in a smooth way if they were rigid, so I’ve adopted a system with a central swing axis Thanks to Benn (a.k.a. zephyr1934) I was able to realize with his custom rods a simplified version of Walschaerts Valve Gear with very visual impact. The locomotive is driven by three medium motors hidden underneath the lining of the boiler; this LEGO version of BR 53-003 has real lighs like all my previous locomotives, and respects original proportions of the real model Enjoy the photo & video gallery: [/size]Compare to this (not mine) video: [/size] [/size]