PPRuNe Forums - View Single Post - Which aircraft have pos/neg elevator lift?
Old 29th Mar 2009, 16:09
  #43 (permalink)  
ChristiaanJ
 
Join Date: Jan 2005
Location: France
Posts: 2,319
Originally Posted by Mad (Flt) Scientist
The key is that stability is concerned with the CHANGE in forces and moments in response to a disturbance - the absolute values matter for trim and control, not for stability. Which is why the branch of aerospace engineering concerned with these matters is called "stability and control" - both need to be considered, and they are not the same thing.
Thanks, MFL !
Exactly what I would have said if I had been able to get my tongue (errr... keyboard) around it in a clear and concise manner.
I graduated with "stability and control" as my main subject, but it IS forty years ago.

CJ
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