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Old 10th Aug 2018, 23:05
  #5 (permalink)  
Chesty Morgan
Gender Faculty Specialist
Join Date: Mar 2002
Location: Stop being so stupid, it's my turn
Posts: 1,701
The main reason to trim in HDG is because LNAV follows a track and, therefore, the heading will change with wind changes. You canít then be sure that the reaction of the control column is due to you trimming or wind change.

In HDG this wonít happen.
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