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Old 10th Oct 2008, 19:30
  #17 (permalink)  
fellman
 
Join Date: Oct 2007
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Not quite right PEI_3721.
The required VS will be reached in however long it takes using the specified acceleration. The times quoted in the guidelines are the delay from the issue of the RA to the pilot moving the stick.
For an initial RA the required acceleration is 1/4g with the manouevre starting no longer than 5 seconds after the RA is issued.
For a subsequent change in RA the required acceleration is 1/4g (for weakening RAs or "normal" strengthening RAs) or 1/3g (for RA reversals and RAs strengthening to "INCREASE CLIMB"/"INCREASE DESCENT") in both cases starting no longer than 2.5 seconds after the change in RA is issued.
These accelerations and times are indeed applicable at all altitudes.
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