[WWI] 1/144 scale WWI aircraft

[Ivan Carlos Ruchesi]

Diego Fernetti <dfernet0 at rosario.gov.ar> escribió:    
 the fabric representation sags down on the lower surface of the wings
looking correct to me
(on the Eduard triplane it sags up).

>While trying to imagine how something may sag up (this knowledge >can be
>useful someday),
   
  That effect is produced by the dope when tautening the fabric, so the upper covering wants to descend to the trailing and leading edges level when shrinking (it would go down to the straight line connecting the wing edges, but the fabric being attached to the ribs prevent it to do so). 
  On the underside, the covering also wants to descend to the edges level, so the fabric sags between the ribs. All this is due to the ribs upper and lower curvatures.
   
   
  > I see that you are concerned about the lower surfaces of
>the Eduard kit. The relative indentation of the ribs is a result of the
>tight fabric around a wing with a slight undercamber. Perhaps it's a >bit
>exaggerated on a 1/72 kit, however this appareance is realistic in >some
>degree, while protruding ribs on the uderside, on my point of view, are
>always innacurate.
   
   
  I agree, but this effect is very subtle and depends on the rib spacing, closer ribs reducing the fabric sag and viceversa.
   
   
  Ivan




       
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