{"product_id":"ums-7-cylinder-360cc-petrol-radial-engine-4-stroke-scale-aircraft-powerplant","title":"UMS 7-Cylinder 360cc Petrol Radial Engine – 4-Stroke Scale Aircraft Powerplant","description":"\u003cp data-start=\"379\" data-end=\"758\"\u003eThe \u003cstrong data-start=\"383\" data-end=\"428\"\u003eUMS 7-Cylinder 360cc Petrol Radial Engine\u003c\/strong\u003e is a high-performance, 4-stroke powerplant designed for serious scale aircraft builders. Delivering breath-taking realism and smooth, powerful performance, this \u003cstrong data-start=\"589\" data-end=\"619\"\u003eready-to-run radial engine\u003c\/strong\u003e combines authentic appearance with modern engineering, making it the perfect centrepiece for large-scale RC and replica aircraft projects.\u003c\/p\u003e\n\u003ch2 data-start=\"765\" data-end=\"793\"\u003e\u003cstrong data-start=\"768\" data-end=\"791\"\u003eProduct Description\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"795\" data-end=\"1108\"\u003eThe \u003cstrong data-start=\"799\" data-end=\"837\"\u003eUMS 7-Cylinder 360cc Radial Engine\u003c\/strong\u003e is engineered to provide both \u003cstrong data-start=\"868\" data-end=\"905\"\u003etrue-to-scale visual authenticity\u003c\/strong\u003e and \u003cstrong data-start=\"910\" data-end=\"947\"\u003ereliable, high-output performance\u003c\/strong\u003e. Its classic 7-cylinder radial configuration closely replicates full-scale aviation engines while delivering smooth, balanced operation across a wide RPM range.\u003c\/p\u003e\n\u003cp data-start=\"1110\" data-end=\"1461\"\u003eWith a substantial \u003cstrong data-start=\"1129\" data-end=\"1151\"\u003e360cc displacement\u003c\/strong\u003e, this engine produces impressive torque and thrust, ideal for large warbirds, scale aerobatic aircraft, and museum-quality replica builds. Supplied \u003cstrong data-start=\"1300\" data-end=\"1316\"\u003eready to run\u003c\/strong\u003e, it includes an exhaust collector ring, electronic ignition, spark plugs, and engine mount, allowing for straightforward installation and setup.\u003c\/p\u003e\n\u003cp data-start=\"1463\" data-end=\"1873\"\u003ePrecision CNC machining from aluminium and bar stock ensures exceptional build quality. Aircraft-grade aluminium alloy cylinder heads and crankcases provide outstanding strength without unnecessary weight. Internally, a \u003cstrong data-start=\"1683\" data-end=\"1712\"\u003edouble-bearing crankshaft\u003c\/strong\u003e, billet aluminium pistons with hardened steel rings, and \u003cstrong data-start=\"1770\" data-end=\"1801\"\u003ehard-chromed cylinder bores\u003c\/strong\u003e ensure long-term durability, smooth running, and excellent compression.\u003c\/p\u003e\n\u003cp data-start=\"1875\" data-end=\"2092\"\u003eUser-friendly throttle and choke bellcranks simplify installation and day-to-day operation, while compatibility with \u003cstrong data-start=\"1992\" data-end=\"2016\"\u003e87–110 octane petrol\u003c\/strong\u003e and a \u003cstrong data-start=\"2023\" data-end=\"2044\"\u003e32:1 fuel mixture\u003c\/strong\u003e makes this engine both practical and versatile.\u003c\/p\u003e\n\u003cp data-start=\"2094\" data-end=\"2256\"\u003eDesigned for builders who demand \u003cstrong data-start=\"2127\" data-end=\"2193\"\u003eauthentic sound, scale realism, and uncompromising performance\u003c\/strong\u003e, the UMS 7-360cc radial engine is a true statement powerplant.\u003c\/p\u003e\n\u003ch2 data-start=\"2263\" data-end=\"2284\"\u003e\u003cstrong data-start=\"2266\" data-end=\"2282\"\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"2285\" data-end=\"2979\"\u003e\n\u003cli data-start=\"2285\" data-end=\"2350\"\u003e\n\u003cp data-start=\"2287\" data-end=\"2350\"\u003e7-cylinder 4-stroke radial engine for unmatched scale realism\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2351\" data-end=\"2413\"\u003e\n\u003cp data-start=\"2353\" data-end=\"2413\"\u003e360cc displacement delivering high torque and smooth power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2414\" data-end=\"2496\"\u003e\n\u003cp data-start=\"2416\" data-end=\"2496\"\u003eReady-to-run package including ignition, plugs, exhaust collector ring \u0026amp; mount\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2497\" data-end=\"2560\"\u003e\n\u003cp data-start=\"2499\" data-end=\"2560\"\u003ePrecision CNC-machined aluminium and bar stock construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2561\" data-end=\"2615\"\u003e\n\u003cp data-start=\"2563\" data-end=\"2615\"\u003eAircraft-grade alloy cylinder heads and crankcases\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2616\" data-end=\"2674\"\u003e\n\u003cp data-start=\"2618\" data-end=\"2674\"\u003eDouble-bearing crankshaft for smooth, stable operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2675\" data-end=\"2736\"\u003e\n\u003cp data-start=\"2677\" data-end=\"2736\"\u003eBillet aluminium pistons with hardened steel piston rings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2737\" data-end=\"2808\"\u003e\n\u003cp data-start=\"2739\" data-end=\"2808\"\u003eHard-chromed and lapped cylinder bores for durability and longevity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2809\" data-end=\"2862\"\u003e\n\u003cp data-start=\"2811\" data-end=\"2862\"\u003eHardened steel camshaft for reliable valve timing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2863\" data-end=\"2922\"\u003e\n\u003cp data-start=\"2865\" data-end=\"2922\"\u003eIntegrated choke and throttle bellcranks for easy setup\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2923\" data-end=\"2979\"\u003e\n\u003cp data-start=\"2925\" data-end=\"2979\"\u003eCompatible with 87–110 octane petrol (32:1 fuel mix)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"2986\" data-end=\"3006\"\u003e\u003cstrong data-start=\"2989\" data-end=\"3004\"\u003ePerfect For\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul data-start=\"3007\" data-end=\"3305\"\u003e\n\u003cli data-start=\"3007\" data-end=\"3055\"\u003e\n\u003cp data-start=\"3009\" data-end=\"3055\"\u003eLarge-scale RC warbirds and vintage aircraft\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3056\" data-end=\"3109\"\u003e\n\u003cp data-start=\"3058\" data-end=\"3109\"\u003eMuseum-quality and competition-level scale builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3110\" data-end=\"3175\"\u003e\n\u003cp data-start=\"3112\" data-end=\"3175\"\u003eBuilders seeking authentic radial engine appearance and sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3176\" data-end=\"3246\"\u003e\n\u003cp data-start=\"3178\" data-end=\"3246\"\u003eHigh-torque applications requiring smooth, reliable 4-stroke power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3247\" data-end=\"3305\"\u003e\n\u003cp data-start=\"3249\" data-end=\"3305\"\u003eAdvanced hobbyists and professional aircraft modellers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"3312\" data-end=\"3335\"\u003e\u003cstrong data-start=\"3315\" data-end=\"3333\"\u003eSpecifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"3337\" data-end=\"3824\"\u003e\u003cstrong data-start=\"3337\" data-end=\"3353\"\u003eEngine Type:\u003c\/strong\u003e 4-Stroke\u003cbr data-start=\"3362\" data-end=\"3365\"\u003e\u003cstrong data-start=\"3365\" data-end=\"3379\"\u003eCylinders:\u003c\/strong\u003e 7 (ABC Type)\u003cbr data-start=\"3392\" data-end=\"3395\"\u003e\u003cstrong data-start=\"3395\" data-end=\"3412\"\u003eDisplacement:\u003c\/strong\u003e 360cc\u003cbr data-start=\"3418\" data-end=\"3421\"\u003e\u003cstrong data-start=\"3421\" data-end=\"3430\"\u003eBore:\u003c\/strong\u003e 40.0mm\u003cbr data-start=\"3437\" data-end=\"3440\"\u003e\u003cstrong data-start=\"3440\" data-end=\"3451\"\u003eStroke:\u003c\/strong\u003e 42.0mm\u003cbr data-start=\"3458\" data-end=\"3461\"\u003e\u003cstrong data-start=\"3461\" data-end=\"3480\"\u003eApprox. Thrust:\u003c\/strong\u003e 38kgf @ 39×12 prop\u003cbr data-start=\"3499\" data-end=\"3502\"\u003e\u003cstrong data-start=\"3502\" data-end=\"3516\"\u003eRPM Range:\u003c\/strong\u003e 900 – 5,000\u003cbr data-start=\"3528\" data-end=\"3531\"\u003e\u003cstrong data-start=\"3531\" data-end=\"3569\"\u003eWeight (with silencer \u0026amp; ignition):\u003c\/strong\u003e Approx. 9.3kg\u003cbr data-start=\"3583\" data-end=\"3586\"\u003e\u003cstrong data-start=\"3586\" data-end=\"3606\"\u003eEngine Diameter:\u003c\/strong\u003e 340mm\u003cbr data-start=\"3612\" data-end=\"3615\"\u003e\u003cstrong data-start=\"3615\" data-end=\"3633\"\u003eEngine Length:\u003c\/strong\u003e 242mm\u003cbr data-start=\"3639\" data-end=\"3642\"\u003e\u003cstrong data-start=\"3642\" data-end=\"3668\"\u003eRecommended Propeller:\u003c\/strong\u003e 2-Blade 39×12\u003cbr data-start=\"3682\" data-end=\"3685\"\u003e\u003cstrong data-start=\"3685\" data-end=\"3702\"\u003eMuffler Type:\u003c\/strong\u003e Collector Ring\u003cbr data-start=\"3717\" data-end=\"3720\"\u003e\u003cstrong data-start=\"3720\" data-end=\"3735\"\u003eSpark Plug:\u003c\/strong\u003e CM-6 RCExl\u003cbr data-start=\"3746\" data-end=\"3749\"\u003e\u003cstrong data-start=\"3749\" data-end=\"3765\"\u003eCarburettor:\u003c\/strong\u003e Walbro\u003cbr data-start=\"3772\" data-end=\"3775\"\u003e\u003cstrong data-start=\"3775\" data-end=\"3789\"\u003eFuel Type:\u003c\/strong\u003e Petrol (87–110 octane, 32:1 mix)\u003c\/p\u003e\n\u003ch3 data-start=\"3491\" data-end=\"3529\"\u003e\u003cstrong data-start=\"3495\" data-end=\"3529\"\u003eWhy Buy from Probuild Aircraft\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"3530\" data-end=\"3723\"\u003e✅ Official UK stockist – 100% genuine UMS engines\u003cbr data-start=\"3579\" data-end=\"3582\"\u003e✅ Trusted by top international pilots and builders\u003cbr data-start=\"3632\" data-end=\"3635\"\u003e✅ Fast UK shipping and secure packaging\u003cbr data-start=\"3674\" data-end=\"3677\"\u003e✅ Supplying and supporting pilots since 1993\u003c\/p\u003e\n\u003cp data-start=\"3530\" data-end=\"3723\"\u003eManual:\u003c\/p\u003e\n\u003cp data-start=\"3530\" data-end=\"3723\"\u003e\u003ca href=\"https:\/\/ch-ignitions.com\/wp-content\/uploads\/2020\/03\/ums-gas-radial-engine-manual-9-115.pdf\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0934\/7711\/0146\/files\/Screenshot_2026-02-04_115553.png?v=1770206937\" alt=\"\" width=\"233\" height=\"351\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"UMS Engines","offers":[{"title":"Default Title","offer_id":56337239966082,"sku":"UMS7-360","price":4199.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/7711\/0146\/files\/UMS-7-360CC-PETROL.jpg?v=1770741196","url":"https:\/\/www.probuild-uk.co.uk\/products\/ums-7-cylinder-360cc-petrol-radial-engine-4-stroke-scale-aircraft-powerplant","provider":"Probuild Aircraft Ltd","version":"1.0","type":"link"}