{"product_id":"os-max-55ax-40k-engine-with-e-3070-silencer-8-93cc-high-power-sport-aerobatic-glow-engine","title":"OS MAX 55AX (40K) Engine with E-3070 Silencer – 8.93cc High-Power Sport \u0026 Aerobatic Glow Engine","description":"\u003cp data-start=\"286\" data-end=\"631\"\u003eThe \u003cstrong data-start=\"290\" data-end=\"311\"\u003eOS MAX 55AX (40K)\u003c\/strong\u003e is designed for pilots who want the highest power output in a compact, lightweight package. Sharing the same mounting dimensions as the popular 46AX, the 55AX delivers a significant performance boost with \u003cstrong data-start=\"517\" data-end=\"536\"\u003e1.75PS (1.68hp)\u003c\/strong\u003e of usable power, making it an exceptional upgrade for .46-size airframes without modification.\u003c\/p\u003e\n\u003cp data-start=\"633\" data-end=\"972\"\u003eFeaturing the distinctive \u003cstrong data-start=\"659\" data-end=\"691\"\u003eAX-series cooling fin design\u003c\/strong\u003e, the 55AX maintains excellent temperature stability under load, while the rearward-angled needle valve ensures safer and easier carburettor adjustments. The new \u003cstrong data-start=\"853\" data-end=\"872\"\u003e40K carburettor\u003c\/strong\u003e enhances fuel metering and contributes to increased horsepower over the older 40J-equipped engines.\u003c\/p\u003e\n\u003cp data-start=\"974\" data-end=\"1172\"\u003eDelivered with the \u003cstrong data-start=\"993\" data-end=\"1012\"\u003eE-3070 Silencer\u003c\/strong\u003e, the 55AX offers strong thrust, crisp throttle response, and reduced noise levels—making it ideal for a wide range of \u003cstrong data-start=\"1131\" data-end=\"1171\"\u003esport, scale, and aerobatic aircraft\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3 data-start=\"1179\" data-end=\"1199\"\u003e\u003cstrong data-start=\"1183\" data-end=\"1199\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1200\" data-end=\"1660\"\u003e\n\u003cli data-start=\"1200\" data-end=\"1265\"\u003e\n\u003cp data-start=\"1202\" data-end=\"1265\"\u003eSame mounting dimensions as the 46AX – simple drop-in upgrade\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1266\" data-end=\"1325\"\u003e\n\u003cp data-start=\"1268\" data-end=\"1325\"\u003eIncreased power output: \u003cstrong data-start=\"1292\" data-end=\"1323\"\u003e1.75PS \/ 1.68hp @ 16,000rpm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1326\" data-end=\"1398\"\u003e\n\u003cp data-start=\"1328\" data-end=\"1398\"\u003eImproved \u003cstrong data-start=\"1337\" data-end=\"1356\"\u003e40K carburettor\u003c\/strong\u003e for more horsepower and better response\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1399\" data-end=\"1465\"\u003e\n\u003cp data-start=\"1401\" data-end=\"1465\"\u003eAX-series \u003cstrong data-start=\"1411\" data-end=\"1433\"\u003ecooling fin design\u003c\/strong\u003e for efficient heat management\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1466\" data-end=\"1513\"\u003e\n\u003cp data-start=\"1468\" data-end=\"1513\"\u003eSafety-focused rearward-angled needle valve\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1514\" data-end=\"1586\"\u003e\n\u003cp data-start=\"1516\" data-end=\"1586\"\u003eSupplied with the \u003cstrong data-start=\"1534\" data-end=\"1553\"\u003eE-3070 Silencer\u003c\/strong\u003e for quieter, efficient running\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1587\" data-end=\"1660\"\u003e\n\u003cp data-start=\"1589\" data-end=\"1660\"\u003ePerfect for sport, aerobatic, and scale aircraft in the .46–.55 class\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1667\" data-end=\"1686\"\u003e\u003cstrong data-start=\"1671\" data-end=\"1686\"\u003ePerfect For\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1687\" data-end=\"1879\"\u003e\n\u003cli data-start=\"1687\" data-end=\"1705\"\u003e\n\u003cp data-start=\"1689\" data-end=\"1705\"\u003eSport aircraft\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1706\" data-end=\"1733\"\u003e\n\u003cp data-start=\"1708\" data-end=\"1733\"\u003e3D and aerobatic models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1734\" data-end=\"1752\"\u003e\n\u003cp data-start=\"1736\" data-end=\"1752\"\u003eScale aircraft\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1753\" data-end=\"1817\"\u003e\n\u003cp data-start=\"1755\" data-end=\"1817\"\u003ePilots upgrading from the OS 46AX or other .46-class engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1818\" data-end=\"1879\"\u003e\n\u003cp data-start=\"1820\" data-end=\"1879\"\u003eModels needing more thrust without increasing engine size\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1886\" data-end=\"1909\"\u003e\u003cstrong data-start=\"1890\" data-end=\"1909\"\u003eProduct Summary\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1910\" data-end=\"2182\"\u003eThe OS MAX 55AX (40K) brings more power, better cooling, and improved throttle response to the proven AX platform. With its drop-in compatibility and enhanced 40K carburettor, it’s an ideal choice for anyone looking to extract maximum performance from a .46-size airframe.\u003c\/p\u003e\n\u003ch2 data-start=\"2189\" data-end=\"2210\"\u003e\u003cstrong data-start=\"2192\" data-end=\"2210\"\u003eSpecifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"2211\" data-end=\"2492\"\u003e\n\u003cli data-start=\"2211\" data-end=\"2256\"\u003e\n\u003cp data-start=\"2213\" data-end=\"2256\"\u003e\u003cstrong data-start=\"2213\" data-end=\"2224\"\u003eWeight:\u003c\/strong\u003e 525g (18.52 oz) with silencer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2257\" data-end=\"2296\"\u003e\n\u003cp data-start=\"2259\" data-end=\"2296\"\u003e\u003cstrong data-start=\"2259\" data-end=\"2272\"\u003eCapacity:\u003c\/strong\u003e 8.93cc (0.545 cu.in.)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2297\" data-end=\"2336\"\u003e\n\u003cp data-start=\"2299\" data-end=\"2336\"\u003e\u003cstrong data-start=\"2299\" data-end=\"2319\"\u003ePropeller Range:\u003c\/strong\u003e 12×7–8, 13×6–7\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2337\" data-end=\"2364\"\u003e\n\u003cp data-start=\"2339\" data-end=\"2364\"\u003e\u003cstrong data-start=\"2339\" data-end=\"2348\"\u003eBore:\u003c\/strong\u003e 23mm (0.906\")\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2365\" data-end=\"2396\"\u003e\n\u003cp data-start=\"2367\" data-end=\"2396\"\u003e\u003cstrong data-start=\"2367\" data-end=\"2378\"\u003eStroke:\u003c\/strong\u003e 21.5mm (0.846\")\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2397\" data-end=\"2448\"\u003e\n\u003cp data-start=\"2399\" data-end=\"2448\"\u003e\u003cstrong data-start=\"2399\" data-end=\"2416\"\u003ePower Output:\u003c\/strong\u003e 1.68hp (1.75 PS) @ 16,000 rpm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2449\" data-end=\"2492\"\u003e\n\u003cp data-start=\"2451\" data-end=\"2492\"\u003e\u003cstrong data-start=\"2451\" data-end=\"2475\"\u003ePractical RPM Range:\u003c\/strong\u003e 2,000 – 17,000\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"2499\" data-end=\"2536\"\u003e\u003cstrong data-start=\"2502\" data-end=\"2536\"\u003eWhy Buy From Probuild Aircraft\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"2537\" data-end=\"2731\"\u003e\n\u003cli data-start=\"2537\" data-end=\"2577\"\u003e\n\u003cp data-start=\"2539\" data-end=\"2577\"\u003e✅ \u003cstrong data-start=\"2541\" data-end=\"2575\"\u003eOfficial UK OS Engine Stockist\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2578\" data-end=\"2609\"\u003e\n\u003cp data-start=\"2580\" data-end=\"2609\"\u003e✅ \u003cstrong data-start=\"2582\" data-end=\"2607\"\u003e100% Genuine Products\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2610\" data-end=\"2655\"\u003e\n\u003cp data-start=\"2612\" data-end=\"2655\"\u003e✅ \u003cstrong data-start=\"2614\" data-end=\"2653\"\u003eTrusted by Top International Pilots\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2656\" data-end=\"2692\"\u003e\n\u003cp data-start=\"2658\" data-end=\"2692\"\u003e✅ \u003cstrong data-start=\"2660\" data-end=\"2690\"\u003eFast, Reliable UK Shipping\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2693\" data-end=\"2731\"\u003e\n\u003cp data-start=\"2695\" data-end=\"2731\"\u003e✅ \u003cstrong data-start=\"2697\" data-end=\"2729\"\u003eTrusted by Pilots Since 1993\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OS Engines","offers":[{"title":"Default Title","offer_id":56017533534594,"sku":"L-OS15612","price":127.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/7711\/0146\/files\/l-os15612.jpg?v=1764333195","url":"https:\/\/www.probuild-uk.co.uk\/products\/os-max-55ax-40k-engine-with-e-3070-silencer-8-93cc-high-power-sport-aerobatic-glow-engine","provider":"Probuild Aircraft Ltd","version":"1.0","type":"link"}