PPRuNe Forums - View Single Post - Wing positioning to reduce drag
View Single Post
Old 10th Oct 2008, 17:28
  #29 (permalink)  
bjornhall
 
Join Date: Mar 2007
Location: Right here
Age: 50
Posts: 420
Likes: 0
Received 0 Likes on 0 Posts
Just as well that engineers don't care about what you "think".
Read a few engineering textbooks before filling a page with waffle, please?
What nonsense.

See the link to See how it flies earlier in the thread, it explains nicely:
a) that a downforce from the tail is not necessary for stability,
b) why that is so (decalage!),
c) why, a) and b) notwithstanding, most aircraft need a downforce from the tail most of the time to remain stable (prompting the myth that a downforce is necessary, and the various hand waving arguments to "prove" it),
d) what simple experiment you can make to find out whether your light GA aircraft has a downforce or an upforce from the tail in different flight regimes,
e) why canards typically, but not necessarily, need longer runways than more ordinary designs (exception: delta + canard vs pure delta).
bjornhall is offline