{"product_id":"part-built-2-inch-scale-minnie-traction-engine-stock-code-4194","title":"Part-built 2 inch scale Minnie traction engine","description":"\u003cp\u003eAn exceptionally well-built \"Minnie\" in 2 inch scale, a model which  makes up into a decent-sized engine, more than capable of hauling a couple of  people around.    \u003c\/p\u003e\u003cp\u003eAll-welded steel boiler with steel tubes, working pressure 80psi, twin safety  valves, feed by mechanical pump.    \u003c\/p\u003e\u003cp\u003eCast iron cylinder with slide valve actuated by Stephenson's gear with pole  reverser on the footplate, mechanical lubricator.    \u003c\/p\u003e\u003cp\u003eWorkmanship is to a high standard throughout, fit and finish of the  motionwork and gearing is very good with the engine running well on air, standard of welding is  superb throughout.    \u003c\/p\u003e\u003cp\u003eThe engine has had its initial twice working pressure hydraulic test, however  note that the original \"Minnie\" design relied on a single mechanical  pump for boiler feed - to pass a current steam test the engine will require a  second, independent means of putting water in the boiler. Although inelegant,  the easiest way of achieving this would be to fit a handpump sharing the clack  valve (the check valves on both pumps protecting each from the other's outflow).  Far nicer would be to fit an injector, although this would require a selector  valve at the clack, like the 7nhp Marshall design, to stop the pump pushing  water straight out of the injector's overflow.    \u003c\/p\u003e\u003cp\u003eHydraulic test @160psi, 28-6-2010    \u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ccenter\u003e\u003c\/center\u003e","brand":"Station Road Steam","offers":[{"title":"Default Title","offer_id":54019046113621,"sku":"4194","price":3950.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1023\/0094\/2677\/files\/4194-1.webp?v=1779901370","url":"https:\/\/stationroadsteam.com\/products\/part-built-2-inch-scale-minnie-traction-engine-stock-code-4194","provider":"Station Road Steam","version":"1.0","type":"link"}