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Old 23rd Mar 2020, 21:22
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PPRuNeUser0211
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Bell 206 Main Drive Shaft failure

Team,

I'm not familiar with the tech for a 206 (never had the opportunity to fly one). However, I'm reading a manual for a TH67 and it states that in the event of a main drive Shaft failure you'll get a sudden increase in engine rpm (as the load is shed) decrease in rotor rpm and a yaw as the torque disappears. All of this is pretty vanilla

However, it also says the engine must remain in operation to provide power to the tail rotor and that loss of control may occur if the engine is shut down.

My understanding is that conventional wisdom drives the TR from the MRGB - is this manual talking about a drive shaft failure between mrgb and the rotor system itself? Or is there something unusual about the 206 setup?
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