{"product_id":"o-s-speed-91hz-r-3d-helicopter-engine","title":"O.S.Speed 91HZ-R 3D Helicopter Engine","description":"\u003cp\u003eFollowing the popularity of the 91HZ-R with on-demand regulator, O.S. has now taken high-performance, high-speed helicopter engines to the next stage of evolution. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLightweight, machined heat sink head\u003c\/li\u003e\n\u003cli\u003eBig-bore carburettors best-suited for the intended use (F3C or 3D)\u003c\/li\u003e\n\u003cli\u003eBest precision advanced exhaust cylinder timing (for F3C or 3D)\u003c\/li\u003e\n\u003cli\u003eNewly designed combustion chambers, shaped to match the big bore carburetors and advanced exhaust cylinder timing\u003c\/li\u003e\n\u003cli\u003eLightweight, forged steel crankshaft counter weight to lower vibration for higher speeds\u003c\/li\u003e\n\u003cli\u003eImproved back plate shape, to accommodate Futaba's BPS-1 RPM Sensor and increase primary pressure for greater stability\u003c\/li\u003e\n\u003cli\u003eThe cover plate has a cell to accept a sensor designed to install in the cover plate from Futaba GY701 \/ CGY750 Governor\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDisplacement: 14.95cc\u003c\/li\u003e\n\u003cli\u003eBore: 27.7mm\u003c\/li\u003e\n\u003cli\u003eStroke: 24.8mm\u003c\/li\u003e\n\u003cli\u003eOutput: 3.6ps\/15,500RPM\u003c\/li\u003e\n\u003cli\u003ePractical RPM Range: 2,000-16,500\u003c\/li\u003e\n\u003cli\u003eWeight: 603g\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngine Pack O.S. Speed Tuned .91HZ-R Helicopter Engine with Pump, 61G Carb\u003c\/li\u003e\n\u003cli\u003e#8 Glow Plug\u003c\/li\u003e\n\u003cli\u003eCheck Valve\u003c\/li\u003e\n\u003cli\u003eHead Gasket 0.2mm\u003c\/li\u003e\n\u003cli\u003eOS Speed Decal and English Instruction Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0670\/6105\/5655\/files\/OS-3.png?v=1730241907\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0670\/6105\/5655\/files\/OS-2.png?v=1730241907\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0670\/6105\/5655\/files\/OS-4.png?v=1730241907\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0670\/6105\/5655\/files\/OS-5.png?v=1730241907\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0670\/6105\/5655\/files\/OS-6.png?v=1730241907\" alt=\"\"\u003e\u003c\/p\u003e","brand":"OS Engines","offers":[{"title":"Default Title","offer_id":54370131247414,"sku":"OS-18642","price":383.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/4114\/1302\/files\/OS-1.png?v=1785881849","url":"https:\/\/sparisdress.com\/products\/o-s-speed-91hz-r-3d-helicopter-engine","provider":"Sparisdress","version":"1.0","type":"link"}