PPRuNe Forums - View Single Post - " FAA concerned about increase in manual handling errors"
Old 14th Jan 2013, 02:28
  #39 (permalink)  
woodja51
 
Join Date: Mar 2006
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Arc technique

Very good post.... In fact the taught technique of 10-15 ahead /behind the needle is for that exact reason of cutout alignment thresholds and false horizon on rollout.

However- the A330 fmgs when flying arcs depending on the range, flies them as low AOB and the stby AI will have residual bank on rollout.. It might be digital etc but has the same albeit minor issue. so not just a steam driven problem.

Similarly autothrust in holding ..... Older aircraft without autothrottle/thrust you would hold in a race track at about min drag plus ten kts... That way thrust remained constant, and speed dropped due to the turns , but stayed above min drag = lessfuel burn.

New aircraft fly min clean , or green dot in the hold and thus " throttle bash " to hold the selected speed = burn more fuel...

So some of the old technques are still valid but the history has or is getting lost ...
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