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Old 19th Jul 2011, 19:32
  #67 (permalink)  
Trim Stab
 
Join Date: Feb 2010
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Prop configuration on A400

Judging from the curve of the prop blades (as shown from the close up photos in post 62), the rotation of props one & four would appear to be supra-convergent, which is what one would expect if the designers had the luxury of specifying the engine/gearbox/prop configuration.

But why do props two & three appear to be supra-divergent?

If the A400 had a conventional tail, I would guess that it could be to reduce drag from the horizontal tail surface. But with a high T-tail, what benefit does this give?
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