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      OS Engines 91HZ-R 3D Speed Helicopter Engine, Black
  
OS Engines 91HZ-R 3D Speed Helicopter Engine, Black
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    DetailProduct SpecsBore1.091" (28 mm) Displacement14.95 cc / 0.912 cu.in. Manufacturer #18642 Product Height4.8" (122 mm) Product Length6.4" (163 mm) Product Width5.1" (130 mm) RPM Range2,000-16,000 Stroke24.8 mm / 0.976 in. Total Weight1.329lbs (603g) 
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