Apply to 90 size helicopters, according to the strength character of 90 engine to design, features much increase the horsepower, fuel-saving, low noise, and the highest air exhaust volume on the market.
Great design and test to three spaces: expansion chamber, accelerated section, silencer chamber, high efficiency and the quick respond of medium speed and high speed, great for 3D flying.
Use for O.S 91SR/HZ & ALIGN 91H/HP engine. |
Size:Ö49.1 x 318 x 81.75mm
Weight:260g
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