Re: [PSUBS-MAILIST] Inner / Outer support ribs.

[Carsten Standfuss <Merlinsub@t-online.de>]

Outside ribs : 

Pro - more space inside

contra - no streamline outside anymore
contra - corossion outside, special if doublehull concept
contra - welds on pull, needs good and full welds instead of
inside             welds under pressure have just to huld the frame in
place.. 
contra - to build a round hull is more tricky

Useful places example scetch : 

http://www.prismnet.com/~moki/20050111.115907/OptimizedXcylinderXpressureXhullX001.jpg

regards Carsten


> Myles Hall schrieb:
> 
> I understand that support ribs offer the same strength increase
> whether they are on the inside or outside of the pressure hull.  As I
> am planning on adding fairing, I am also considering puting the ribs
> on the outside to free up interior space.  Is this a good idea ?  In
> other words, is it easier to install the ribs when they are on the
> outside ?  Are the ribs pre-made and then welded on or built right
> onto the pressure hull ?  I can't seem to figure out the ribs, how
> they are made, and the best way to install them.  My pressure hull is
> of a similar design as the K350 36" x 1/4 " x 8'.  I am considering a
> rib spacing of 18".
> 
> Myles.




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