Short YouTube safety clip discussing a Robinson R44 hydraulic pre-takeoff check: the speaker describes a hydraulic test (at 100% hydraulic setting) that involves pulling the cyclic back ~1.5–2 inches to feel vibration, then pushing the cyclic forward several times to detect resistance or lag indicating possible servo failure. Kenny Keller adds commentary and promotes a free Private Pilot 101 Helicopter Training Blueprint resource.
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On one of the latest Robinson safety notices they are telling us to perform on the R44 Raven 1, Raven 2 R44 series with hydraulics. Our hydraulic test at 100%. So they're telling us that we want to go back about an inch and a half or two inches on the cyclic, feel that slight vibration, maybe our viewers can see it in the panel and then push our cyclic forward several times to feel any sort of resistance or lag on the system that could tell us, warn us about an impending servo failure or about any other deficiency in the system that needs to get checked. Nothing small, but that can keep us safe in the future.
Sure, sounds good. Great tip. I learned something.
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