Buggsy2
Well Known Member
I am at the top of page 9-5 (Canopy) for the RV-9 but I'm sure this is the same for an RV-7, a tipup canopy.
The instructions for the F-631A "ribs" (I like to call them hoops) call for the outer flange to be bent to an angle of 92.5 degrees (bend flange to inside the channel). OK, I'm doing that and sure enough the hoops no longer lay flat on a table. But Vans anticipates that and says to flute the hoops to make them lay flat. This last part puzzles me.
There are 4 possible ways to flute: outer or inner flange, and flute depression inside or outside of the flange. All these choices! I don't know which choice to use to make the hoop flat.
I tested on a bit of scrap 0.025 angle but couldn't see it any consistent pattern to fluting direction ==> bending. So I'm asking here for hints.![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
TiA!!
The instructions for the F-631A "ribs" (I like to call them hoops) call for the outer flange to be bent to an angle of 92.5 degrees (bend flange to inside the channel). OK, I'm doing that and sure enough the hoops no longer lay flat on a table. But Vans anticipates that and says to flute the hoops to make them lay flat. This last part puzzles me.
There are 4 possible ways to flute: outer or inner flange, and flute depression inside or outside of the flange. All these choices! I don't know which choice to use to make the hoop flat.
I tested on a bit of scrap 0.025 angle but couldn't see it any consistent pattern to fluting direction ==> bending. So I'm asking here for hints.
TiA!!