PPRuNe Forums - View Single Post - AAIB investigation to Hawker Hunter T7 G-BXFI 22 August 2015
Old 18th Mar 2017, 23:15
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Tailspin Turtle
 
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Originally Posted by hum
Interesting pic from another forum showing actual vs 'planned' (according to AAIB video) pull up..



A very early pull, inapropriate throttle and aileron inputs, no escape attempt until a late pull very strongly suggest a transient cognitive impairment..
This illustration doesn't look right. Minor problem: the run-in should probably be along a line denoted by the radar hits. However, the actual pull-up had to be about as early as shown because bending the loop had to be done before reaching the extended show line. To start a pull up at the "planned" square would have put the upward side of the loop well inside of the show line, even farther in this instance because he rolled before being vertical. A comparison with the timeline in the AAIB report suggests that the actual pull up was somewhat later than shown by that square based on a comparison of the pull-up time and the radar-hit time. I still think based on the video that he probably pulled up later than he should have, not earlier, because he wound up tracking along A25 not crossing it parallel to the show line.

Incidentally, the margin of error given for the speed at pull up means that he could have been at 325 knots indicated, not 310. Still missing that gate and readily discernible on the airspeed indicator from 350 knots but 25 knots slow and not 40. He might have thought from experience that was fast enough and it might have been for a straight-ahead loop (i.e. no bending, particularly before being vertical), full throttle, and optimum timing and amount of pull.
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