{"product_id":"o-s-speed-21-engine-r21-euro-ii-set-1dr01","title":"OS Speed ​​.21 Engine R21 \"EURO\" II SET - 1DR01","description":"\u003cp data-end=\"849\" data-start=\"413\"\u003eThe \u003cstrong data-end=\"445\" data-start=\"417\"\u003eOS Speed ​​R21 “EURO” II\u003c\/strong\u003e is the logical evolution of the successful \u003cstrong data-end=\"520\" data-start=\"502\"\u003eR21 EURO Spec.\u003c\/strong\u003e and was specifically developed for the demands of European racetracks with \u003cstrong data-end=\"610\" data-start=\"592\"\u003elong straights\u003c\/strong\u003e and high continuous loads. It combines \u003cstrong data-end=\"715\" data-start=\"664\"\u003esmooth, easily controllable power delivery\u003c\/strong\u003e with increased performance in the \u003cstrong data-end=\"789\" data-start=\"748\"\u003elow and mid-range RPMs\u003c\/strong\u003e – ideal for consistent lap times and precise handling.\u003c\/p\u003e\n\n \u003cp data-end=\"1181\" data-start=\"851\"\u003eThe \u003cstrong data-end=\"922\" data-start=\"861\"\u003erevised crankshaft with three tungsten counterweights\u003c\/strong\u003e significantly improved torque at low and mid-range RPMs. At the same time, idle stability and throttle response benefit, making the engine particularly \u003cstrong data-end=\"1139\" data-start=\"1096\"\u003eeasy to tune and control\u003c\/strong\u003e – even during long races.\u003c\/p\u003e\n\n\u003cp data-end=\"1515\" data-start=\"1183\"\u003e A completely redesigned \u003cstrong data-end=\"1238\" data-start=\"1212\"\u003e7-port cylinder\u003c\/strong\u003e , an optimized piston, and additional cooling ports in the exhaust area ensure improved internal cooling and smoother power delivery. The newly developed crankcase further supports improved gas flow and temperature control.\u003c\/p\u003e\n\n \u003cp data-end=\"1902\" data-start=\"1517\"\u003eThe \u003cstrong data-end=\"1540\" data-start=\"1521\"\u003eouter cooling head\u003c\/strong\u003e adopts the proven design of the R2104, offering excellent cooling performance with reduced weight. \u003cstrong data-end=\"1681\" data-start=\"1666\"\u003eLaser engraving\u003c\/strong\u003e emphasizes its high-quality racing character. Inside, an \u003cstrong data-end=\"1786\" data-start=\"1752\"\u003eoil-resistant O-ring (black)\u003c\/strong\u003e , also from the R2104, ensures a reliable seal and consistent combustion.\u003c\/p\u003e\n\n\u003cp data-end=\"2118\" data-start=\"1904\"\u003e The engine is delivered as a \u003cstrong data-end=\"1967\" data-start=\"1936\"\u003ematched EURO combo set\u003c\/strong\u003e , consisting of the high-performance \u003cstrong data-end=\"2037\" data-start=\"2004\"\u003eTR01 resonance pipe (EFRA 2098)\u003c\/strong\u003e and the \u003cstrong data-end=\"2062\" data-start=\"2046\"\u003eMR02 manifold\u003c\/strong\u003e – perfectly matched to European high-speed layouts.\u003c\/p\u003e\n\n \u003cp data-end=\"2301\" data-start=\"2120\"\u003eThe standard \u003cstrong data-end=\"2158\" data-start=\"2137\"\u003e21M2 (B) carburetor\u003c\/strong\u003e with \u003cstrong data-end=\"2189\" data-start=\"2163\"\u003eØ8.5 mm venturi insert\u003c\/strong\u003e is popular with many top racing drivers and stands for maximum performance with very good drivability.\u003c\/p\u003e\n\n\u003chr data-end=\"2306\" data-start=\"2303\"\u003e\n\n\u003ch2 data-end=\"2335\" data-start=\"2308\"\u003e Scope of delivery (combo set)\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"2370\" data-start=\"2338\"\u003e \u003cstrong data-end=\"2370\" data-start=\"2338\"\u003eOS Speed ​​R21 EURO II engine\u003c\/strong\u003e\n\u003c\/li\u003e\n\n\u003cli data-end=\"2406\" data-start=\"2373\"\u003e \u003cstrong data-end=\"2406\" data-start=\"2373\"\u003eTR01 Resonance tube (EFRA 2098)\u003c\/strong\u003e\n\u003c\/li\u003e\n\n\u003cli data-end=\"2425\" data-start=\"2409\"\u003e \u003cstrong data-end=\"2425\" data-start=\"2409\"\u003eMR02 manifold\u003c\/strong\u003e\n\u003c\/li\u003e\n\n\u003cli data-end=\"2445\" data-start=\"2428\"\u003e \u003cstrong data-end=\"2445\" data-start=\"2428\"\u003eGlow plug RP7\u003c\/strong\u003e\n\u003c\/li\u003e\n\n\u003cli data-end=\"2469\" data-start=\"2448\"\u003e Exhaust sealing ring\u003c\/li\u003e\n\n\u003cli data-end=\"2510\" data-start=\"2472\"\u003e Dust cap set (Ø3 \/ Ø16 \/ Ø18) \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr data-end=\"2515\" data-start=\"2512\"\u003e\n\n\u003ch2 data-end=\"2535\" data-start=\"2517\"\u003e Product features\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"2583\" data-start=\"2538\"\u003e 1:8 Onroad Nitro racing engine \u003cstrong data-end=\"2583\" data-start=\"2565\"\u003e.21 \/ 3.49 cc\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"2644\" data-start=\"2586\"\u003e\n\n \u003cstrong data-end=\"2605\" data-start=\"2586\"\u003eEURO II version\u003c\/strong\u003e , specifically for European racetracks\u003c\/li\u003e\n\n\u003cli data-end=\"2705\" data-start=\"2647\"\u003e Revised crankshaft with \u003cstrong data-end=\"2705\" data-start=\"2677\"\u003e3 tungsten counterweights\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n \u003cli data-end=\"2775\" data-start=\"2708\"\u003eNoticeably stronger torque in the lower and mid-range RPMs\u003c\/li\u003e\n\n\u003cli data-end=\"2837\" data-start=\"2778\"\u003e Very stable idling characteristics \u0026amp; smooth RPM drop-off\u003c\/li\u003e\n\n\u003cli data-end=\"2883\" data-start=\"2840\"\u003e New 7-channel cylinder \u0026amp; optimized piston\u003c\/li\u003e\n\n\u003cli data-end=\"2935\" data-start=\"2886\"\u003e Additional cooling vents for improved thermal performance\u003c\/li\u003e\n\n\u003cli data-end=\"2998\" data-start=\"2938\"\u003e Cooling head design like the \u003cstrong data-end=\"2972\" data-start=\"2963\"\u003eR2104\u003c\/strong\u003e (lightweight \u0026amp; powerful)\u003c\/li\u003e\n\n\u003cli data-end=\"3044\" data-start=\"3001\"\u003e\n\n \u003cstrong data-end=\"3022\" data-start=\"3001\"\u003e21M2 (B) carburetor\u003c\/strong\u003e incl. Ø8.5 mm venturi\u003c\/li\u003e\n\n\u003cli data-end=\"3095\" data-start=\"3047\"\u003e Ideal for \u003cstrong data-end=\"3095\" data-start=\"3057\"\u003elong straights and tough racing conditions\u003c\/strong\u003e \n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr data-end=\"3100\" data-start=\"3097\"\u003e\n\n\u003ch2 data-end=\"3121\" data-start=\"3102\"\u003e Technical data\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli data-end=\"3157\" data-start=\"3124\"\u003e Engine displacement: \u003cstrong data-end=\"3157\" data-start=\"3133\"\u003e3.49 cc \/ .21 cu in\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"3181\" data-start=\"3160\"\u003e Bore: \u003cstrong data-end=\"3181\" data-start=\"3169\"\u003e16.08 mm\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"3201\" data-start=\"3184\"\u003e Stroke: \u003cstrong data-end=\"3201\" data-start=\"3189\"\u003e17.20 mm\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"3241\" data-start=\"3204\"\u003e Power: \u003cstrong data-end=\"3241\" data-start=\"3214\"\u003e2.8 hp at 35,000 rpm\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"3297\" data-start=\"3244\"\u003e Practical speed range: \u003cstrong data-end=\"3297\" data-start=\"3273\"\u003e4,000 – 45,000 rpm\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"3318\" data-start=\"3300\"\u003e Weight: \u003cstrong data-end=\"3318\" data-start=\"3309\"\u003e340 g\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n \u003cli data-end=\"3347\" data-start=\"3321\"\u003eEngine type: \u003cstrong data-end=\"3347\" data-start=\"3331\"\u003e2-stroke nitro\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"3374\" data-start=\"3350\"\u003e Cooling: \u003cstrong data-end=\"3374\" data-start=\"3359\"\u003eAir-cooled\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-end=\"3414\" data-start=\"3377\"\u003e Intended use: \u003cstrong data-end=\"3414\" data-start=\"3393\"\u003e1:8 On-road Racing\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"O.S.","offers":[{"title":"Default Title","offer_id":47738415874386,"sku":"1DR01","price":550.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/0277\/3586\/files\/1DR00_combo.jpg?v=1708785220","url":"https:\/\/www.rcxx.eu\/en\/products\/o-s-speed-21-engine-r21-euro-ii-set-1dr01","provider":"RCXX - RC Racing Shop | RC Models | Tuning \u0026 Spare Parts for Professionals","version":"1.0","type":"link"}