PPRuNe Forums - View Single Post - BAC One-Eleven crash on test flight. Deep Stall
Old 27th Aug 2020, 14:08
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DaveReidUK
 
Join Date: Jan 2008
Location: Reading, UK
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Originally Posted by blind pew
Iirc there was a hydraulic boost? Fitted to augment elevator control at low speeds..think it operated with full forward stick. The tailplane problem due to high winds was known and was clearly visible if you looked at it during walk around.
There was indeed a hydraulic boost, to provide more AND pitch than the servo tab could produce. See the 3 pages of description of the elevator control system in the accident investigation report I linked to in my previous post.
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