{"title":"Engines \/ Fuel","description":"","products":[{"product_id":"o-s-max-55hz-hyper-engine","title":"O.S. MAX 55HZ Hyper Engine : 15630","description":"\u003cp\u003eThe max 50SX-H Hyper has established an enviable reputation for power, reliability and ease of use. 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The pressurised fuel is then carefully regulated at the carburettor to provide the optimum mixture no matter what demands are placed on it. This is done by using the negative pressure in the carburettor Venturi as part of the regulation system.\u003c\/p\u003e\u003cp\u003eThe carburettor itself has three mixture controls for low\/mid and high speed settings. Once set for the fuel demands of your model\/type of fuel and muffler, there is rarely any need to change those settings again.\u003c\/p\u003e\u003cp\u003eThe main mechanics of the engine itself are the same as the regular Max 55HZ.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWeight: 429g (15.13oz)\u003c\/li\u003e\n\u003cli\u003eDisplacement: 8.93cc (0.55cu.in)\u003c\/li\u003e\n\u003cli\u003eBore: 23mm (0.9in)\u003c\/li\u003e\n\u003cli\u003eStroke: 21.5mm (0.8in)\u003c\/li\u003e\n\u003cli\u003ePower Output: 2.1PS @ 17000rpm\u003c\/li\u003e\n\u003cli\u003ePractical RPM: 2,000 - 20,000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OS","offers":[{"title":"Default Title","offer_id":31929287245922,"sku":"15650","price":269.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0060\/7446\/6402\/products\/15650_90a7d07c-ea65-41b6-8375-1973397d2e20.jpg?v=1638968434"},{"product_id":"o-s-max-105hz-helicopter-engine","title":"O.S. MAX 105HZ Helicopter Engine : 18700","description":"\u003cp\u003eThe biggest, pure helicopter engine that OS have ever made delivers the levels of torque and power demanded by top fliers for both F3C and sport applications.\u003c\/p\u003e\u003cp\u003eThe 15% increase in capacity offers a big increase over the .91 class engines yet still\u003c\/p\u003e","brand":"OS","offers":[{"title":"Default Title","offer_id":31929287311458,"sku":"18700","price":299.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0060\/7446\/6402\/products\/osmg1960-lg.jpg?v=1600911167"},{"product_id":"o-s-max-105hz-r-helicopter-engine","title":"O.S. MAX 105HZ-R Helicopter Engine : 18750","description":"\u003cp\u003eO.S. MAX 105HZ-R Helicopter Engine : 18750\u003c\/p\u003e\u003cp\u003eThe biggest, pure helicopter engine that OS have ever made delivers the levels of torque and power demanded by top fliers for both '3D' and sport applications.\u003c\/p\u003e\u003cp\u003eThe 15% increase in capacity offers a big increase over the .91 class engines yet still fits in mounts designed for that class. Modification to the cooling shroud is also unlikely.\u003c\/p\u003e\u003cp\u003eThe distinctive 'blue anodised' cylinder head distinguishes the 105HZ engines from the 91HZ series yet retains the HZ series styling overall.\u003c\/p\u003e\u003cp\u003eGeneral internal design is very similar to the 91HZ series and draws on OS's deep experience in creating the best helicopter engines for all classes.\u003c\/p\u003e\u003cp\u003eLike the 91HZ-R 3D, the new 105HZ-R utilises the OS 'DRS' fuel delivery system to cope with the extreme manouevres of modern 3D flight.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAdvanatges over 120 size heli engines of other makes:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1) Uses same main gear ratio as .91 class engines\u003c\/li\u003e\n\u003cli\u003e2) Vibration levels the same as the 91HZ so does not tend to break heli parts.\u003c\/li\u003e\n\u003cli\u003e3) Easy carburettor adjustment that stays in tune.\u003c\/li\u003e\n\u003cli\u003e4) Crankcase is noticeably cooler\u003c\/li\u003e\n\u003cli\u003e5) More torque in the mid range for 3D\u003c\/li\u003e\n\u003cli\u003e6) Velocity stack on carburettor sucks cool, undisturbed air from the fan flow.\u003c\/li\u003e\n\u003cli\u003e7) Longer run time per tank\u003c\/li\u003e\n\u003cli\u003e8) 105HZ with 15% nitro is similar power to a 91HZ with 30% nitro.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OS","offers":[{"title":"Default Title","offer_id":31929287344226,"sku":"18750","price":399.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0060\/7446\/6402\/products\/osmg1961-lg.jpg?v=1600911167"},{"product_id":"optimix-rtr16-nitro-car-fuel-1-litre-op1001k","title":"Optimix RTR 16% Nitro Car Fuel - 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