{"product_id":"moc-26403-moc-164704-pneumatic-steam-engine-hand-pump-station-building-blocks","title":"MOC-26403 + MOC-164704 Pneumatic Steam Engine \u0026 Hand Pump Station Building Blocks","description":"\u003ciframe width=\"1337\" height=\"752\" src=\"https:\/\/www.youtube.com\/embed\/6avPWj4MnYQ\" title=\"Lego Technic - Steam Engine Machine\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen\u003e\u003c\/iframe\u003e\n\u003cp dir=\"auto\"\u003eExplore the principles of pneumatic power with the \u003cstrong\u003eMOC-26403 + MOC-164704 Pneumatic Steam Engine \u0026amp; Hand Pump Station Building Blocks\u003c\/strong\u003e. Designed and authorized by \u003cstrong\u003eNico71\u003c\/strong\u003e, this \u003cstrong\u003e1,367-piece\u003c\/strong\u003e combination set brings together a fully pneumatic steam-machine model and a dedicated four-pump air station, creating a complete mechanical system powered entirely by compressed air.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe main machine measures approximately \u003cstrong\u003e38 × 23 × 20 cm\u003c\/strong\u003e and uses two pneumatic cylinders positioned at a \u003cstrong\u003e90° offset\u003c\/strong\u003e to drive the mechanism. Valve timing, moving pistons, a rotating flywheel, speed indication, and adjustable airflow make the operating process clearly visible, while the included hand-pump station provides the compressed air needed to bring the machine to life.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eTwin-Cylinder Pneumatic Engine\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eTwo pneumatic cylinders arranged at a 90° angle work together to create continuous reciprocating motion, driving the machine without the need for an electric drive motor.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eMechanical Valve Gear System\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eA coordinated valve mechanism controls the airflow between the cylinders, recreating the timing principle of a steam engine while allowing builders to observe the relationship between valves, pistons, and rotational motion.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eVisible Flywheel \u0026amp; Piston Motion\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAs compressed air enters the system, the pistons move back and forth while the large flywheel rotates, turning pneumatic pressure into an engaging kinetic display.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eSpeed Indicator \u0026amp; Air Control Valve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe machine incorporates a speed indicator together with an adjustable air-control valve, adding further functionality while demonstrating how airflow affects the operating speed of the mechanism.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFour-Pump Hand Air Station\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe included \u003cstrong\u003eMOC-164704\u003c\/strong\u003e pump station uses \u003cstrong\u003efour manual pneumatic pumps\u003c\/strong\u003e arranged in an ergonomic configuration, allowing compressed air to be generated by hand for the main machine.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eAir Tank for Smoother Operation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAn integrated air tank stores compressed air and helps provide a steadier flow to the pneumatic engine, supporting smoother and more consistent running.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eNo Battery or Drive Motor Required\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThis combination is built around pneumatic power. The included hand-pump station supplies the air pressure mechanically, allowing the engine to operate without relying on an electric drive motor or battery-powered drivetrain.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFrom the Designer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eNico71 created \u003cstrong\u003eMOC-26403 Steam Machine\u003c\/strong\u003e to demonstrate the mechanics of a pneumatic engine using two 90° offset cylinders, a valve-gear system, airflow control, and a visible speed indicator.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe accompanying \u003cstrong\u003eMOC-164704 Hand Pump\u003c\/strong\u003e was later developed as a modernized four-pump air source with an air tank, providing a compact way to supply the airflow and pressure required by pneumatic machines. Together, the two models form a complete hands-on demonstration of compressed-air power and mechanical motion.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eA Functional Mechanical Display\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eWith \u003cstrong\u003e1,367 pieces\u003c\/strong\u003e, moving pneumatic cylinders, visible valve timing, a rotating flywheel, and a dedicated manual air station, this set offers a rewarding building experience for engineering enthusiasts, mechanical-model collectors, and builders interested in pneumatic systems and kinetic machines.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eImportant Note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eSmooth operation depends on maintaining sufficient and consistent airflow. The designer recommends approximately \u003cstrong\u003e2–3 bar\u003c\/strong\u003e of air pressure for the Steam Machine.\u003c\/p\u003e","brand":"LesDiy","offers":[{"title":"Default Title","offer_id":49380426317998,"sku":"3752017","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0063\/2232\/3545\/files\/a3afe425-1f03-4c20-af0e-2fdb216b5b00.jpg?v=1789712998","url":"https:\/\/www.lesdiy.com\/de\/products\/moc-26403-moc-164704-pneumatic-steam-engine-hand-pump-station-building-blocks","provider":"LesDiy","version":"1.0","type":"link"}