O.S. Engines is coming out with a new 91 that is crankcase pressurized! Pics and details inside.
Our friends at RCMania magazine posted these pics and details on this new beast of an engine from O.S. One of the great features is a regulated pressure system that uses the crankcase pressure instead of a pump, like the YS engines have done for years. The crank pressure goes through a check valve into the fuel tank and a regulator on the carb takes care of stabilizing the pressure into the engine for a smooth, consistent run throughout the flight. Here are some of the vitals on the new engine and some pics:
RPM Range: 2,000 – 16,000
3.4hp @ 15,000 RPM
Weight: 625 grams
Source: RC Mania Magazine
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