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Subject: 
Re: New entry for ISCC: "Missing in Action" - Ju 52 airplane
Newsgroups: 
lugnet.adventurers, lugnet.general
Date: 
Wed, 19 Dec 2001 15:31:43 GMT
Viewed: 
188 times
  
In lugnet.adventurers, Reinhard "Ben" Beneke writes:
> In lugnet.adventurers, Fredrik Glöckner writes:
> > "Scott A" <eh105jb@mx1.pair.com> writes:
> > 
> > >  Every time I see it I always wonder why the fuselage and wings are
> > >  covered in corrugated iron(!) - a feature you have kept in your
> > >  models.  The only reason I can come up with is that the designers
> > >  thought it would reduce skin friction? Does anyone know?
> > 
> > 
> > I think it was to save materials cost and weight.  The corrugated
> > shape of the metal made it more rigid.  Hence, less metal was needed
> > to preserve the rigidity of the surface.
> 
> That is exactely right. Corrogated sheets of metal have a much better
> weight / bending-strengthness ratio than flat ones.

The Ford Trimotor (perhaps the most important US airplane of the 1920s) used
corro as well. Not too surprising, since some say it was a copy of an
earlier Fokker. The Ju 52 looks somewhat like it as well.

http://www.geocities.com/CapeCanaveral/Lab/4515/ford.htm
http://www.photovault.com/Link/Technology/Aviation_Commercial/Aircraft/FordTrimotor.html
http://www.panamair.org/Aircraft/fordtrimotor.htm
http://www.fordtrimotor.org/



Message is in Reply To:
  Re: New entry for ISCC: "Missing in Action" - Ju 52 airplane
 
(...) That is exactely right. Corrogated sheets of metal have a much better weight / bending-strengthness ratio than flat ones. But you have two main disadvantages: - the air friction gets higher (because the surface area increases - the modern (...) (25 years ago, 19-Dec-01, to lugnet.adventurers, lugnet.general)

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