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Old 14th January 2006 | 00:00
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Lester
 
Joined: Oct 2005
Posts: 4
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From: Hong Kong
IRS question

Hi,
Here's my question to the panel.... The good FCOM tells me "an IRS removes erroneous groundspeeds on the ground after it's been stationary for 3 mins". OK, but.....how does it know it's stationary if it's suffering with erroneous ground speeds???
Now, on a previous type I flew (small and pointy), with and old gimbled INS ,the system use to consider anything less than 4 kts was an erroneous ground speed and would start to correct for it regardless. Problem? Yep, slow taxy would screw it up.
Any ideas how the IRS does it?
Many thanks in anticipation
Lester

Last edited by Lester; 14th January 2006 at 02:48. Reason: Typo
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