[WWI] Answer to question

Clarence Wentzel cewentzel at yahoo.com
Thu Apr 19 10:37:47 EDT 2007

Date: Wed, 18 Apr 2007 10:37:55 -0700
From: <dr-i.417.17 at cox.net>
Subject: Re: [WWI] SPAD 13 Internal fitting
To: World War I Modeling Mailing List <wwi at wwi-models.org>
Message-ID: <25975144.1176917875772.JavaMail.root at fed1wml22>
Content-Type: text/plain; charset=utf-8

> A!
> > On a somewhat related (and definitely OT) note, perhaps you 
> > this one: How did a 'machine turned' finish prevent 
> > that was its purpose? I've always wondered that.

As soon as I can break free for an hour or two, I intend to go to our 
old OLD real live paper book library here at the FAA Center and see if 
there is a definitive work on the topic


My undrstanding is that the "Machine Turned" finish was a purely decorative process.  Typically, large aluminum panels were formed using a hammer and a form to shape the part.
When the shaping was finished, the surface appearance contained lots of bumps.  The machine turning cleaned up the surface.


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