[Oa] Paper "Beam" for Swivel Roof Mechanism

[KSelena at aol.com]

Jeff & Andrew -- 
I am intrigued by your descriptions of using string to make the roof swivel  
into place, I can't quite picture it. If either of you has photos of such  
mechanisms, I'd appreciate a look at it.
 
The swivel roof mechanism I'm familiar with has a sort of paper "beam" that  
runs from the front to back peaks which is attached to the peaks with tabs.  
Picture a rectangle for one roof side, fold down a 1/4" or 1/2" strip at the 
top  to form the beam and have triangular tabs at the ends of the folded down 
part  which are glued to the peaks at the front & back. You have to tweak the  
tabs' geometry to make it match the angle of the roof slope so the tabs don't  
stick out. And it helps the swivel if you make the roof width a fraction  
longer than the "beam" (which is exactly equal to the width of the side of the  
house) -- i.e., roof sticks out 1/16" or 1/8" on each side, forming a  little 
bit of an overhanging eave. Repeat for the other roof side -- although I  prefer 
to design the roof as one continuous piece with a sort of "M" fold  in the 
middle -- the outside legs of the "M" being the 2 roof sides &  the inside "V" 
part glued together ("|") to form the beam.
 
K. Selena Kim
_http://members.aol.com/kselena/OA/oamainpg.html_ 
(http://members.aol.com/kselena/OA/oamainpg.html) 
 
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