fderfler(at)gmail.com
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 Posted: Fri Jan 16, 2009 8:28 am Post subject: Dutch XL crash finding |
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A couple of quick observations...
1. Based on my career experience as a Washington DC bureaucrat, that notice reads like something written by one person with little coordination and less preparation. My government-trained antenna says , "Pure amateur result from a staff guy under pressure" He's really got nothing to backup anything.
2. Based on my observations of my own GPS systems (Garmin 196 and Garmin 396) even when the antennas are sitting motionless on the back deck of my house, the GPS-derived altitude is all over the place. And, of course, when flying they show ground speed. So, I have a hard time putting a lot of faith in the GPS record to determine the altitude variations, air speed, and G-loading of the aircraft in the few seconds before the accident.
Would some "Dutch rolls" (pardon the pun) show up on a GPS record? (Don't go off on that, it's mostly a bad joke)
I file the Dutch notice under trivial distractions not helpful to the question.
-- Frank Derfler
Flying an AMD-made 601XL over the Florida Keys
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