DLrocket89
Well-Known Member
Hi everyone,
I'll be starting a Bearhawk sometime soonish and have a question related to the wing rib formblocks and possible "undercutting" on the flange side.
Technique 1) Make a formblock, radius both sides, pound ribs. Due to spring back in the aluminum, the ribs flanges won't be at 90 degrees to the rib "bulkhead", so you use a hammer to tap them into shape after using the formblock.
Pros: use 1 formblock both L and R ribs, so they are good and uniform
Con: have to hand "tweak" the ribs, so you can lose some of the uniformity
Technique 2) Make a L and a R formblock, undercutting the edge some so you bend the flange past 90 degrees, so that when it springs back it springs to 90 degrees.
Pros: All work is done on the formblock
Cons: 2 formblocks to make and you're bending past 90 degrees
What do people out there think is the best way to go about doing it?
Thanks!
Dustin
Rockford IL
I'll be starting a Bearhawk sometime soonish and have a question related to the wing rib formblocks and possible "undercutting" on the flange side.
Technique 1) Make a formblock, radius both sides, pound ribs. Due to spring back in the aluminum, the ribs flanges won't be at 90 degrees to the rib "bulkhead", so you use a hammer to tap them into shape after using the formblock.
Pros: use 1 formblock both L and R ribs, so they are good and uniform
Con: have to hand "tweak" the ribs, so you can lose some of the uniformity
Technique 2) Make a L and a R formblock, undercutting the edge some so you bend the flange past 90 degrees, so that when it springs back it springs to 90 degrees.
Pros: All work is done on the formblock
Cons: 2 formblocks to make and you're bending past 90 degrees
What do people out there think is the best way to go about doing it?
Thanks!
Dustin
Rockford IL
