Aero_Octaveus
Well Known Member
Long winded issue here....
Anyone have issues with the alignment of the Elevator Bellcrank F-635 not being perpendicular to the longitudinal axis of the plane?
I'm currently working on the F-706 bulkhead and when I've drilled the 1/4" holes for the bellcrank in the F-728 and F-729 webs/angles, (See Dwg 26) the axis is not parallel to the F-729 rib. Axis is off by about 1/8" putting the bellcrank on quite an angle.
http://4.bp.blogspot.com/-zM-OIuMXJnI/XFUHTS6nnhI/AAAAAAAAF8s/TqxkDrVePDojGgeB3xQxrNFt-jmu7rw6wCK4BGAYYCw/s1600/IMG_0981.JPG
I called vans and their suggestion was to re-drill the holes and add doublers. Since I'm so early in the fuse build, I decided to re-build F-706 bulkhead assembly again. On this second attempt. I haven't drilled the 1/4" holes in the F-728B and F-729B angles yet, however initial measurement of the Factory punched holes looks to still be out about 1/16" with everything built up on the second bulkhead.
http://4.bp.blogspot.com/-aeRR3OF8enM/XGC0Vo2DuOI/AAAAAAAAGC4/l2x9qBWgoR8ykYbHfeUtaz7NwPTOGkPrwCK4BGAYYCw/s1600/IMG_1089.JPG
Should be easy enough to spilt the difference and move one hole forward 1/32" and one hole backward 1/32".
What I'm thinking of doing is avoiding drilling the 1/4" holes in the angles/webs until the Fuselage is more assembled (Just before I have to rivet in the F-728 assembly) My thinking is this scenario will help ensure that the axis bolt can be drilled perpendicular to building lines with certainty.
Any thoughts or opinions?
Anybody have any experience with this?
Anyone have issues with the alignment of the Elevator Bellcrank F-635 not being perpendicular to the longitudinal axis of the plane?
I'm currently working on the F-706 bulkhead and when I've drilled the 1/4" holes for the bellcrank in the F-728 and F-729 webs/angles, (See Dwg 26) the axis is not parallel to the F-729 rib. Axis is off by about 1/8" putting the bellcrank on quite an angle.
http://4.bp.blogspot.com/-zM-OIuMXJnI/XFUHTS6nnhI/AAAAAAAAF8s/TqxkDrVePDojGgeB3xQxrNFt-jmu7rw6wCK4BGAYYCw/s1600/IMG_0981.JPG
I called vans and their suggestion was to re-drill the holes and add doublers. Since I'm so early in the fuse build, I decided to re-build F-706 bulkhead assembly again. On this second attempt. I haven't drilled the 1/4" holes in the F-728B and F-729B angles yet, however initial measurement of the Factory punched holes looks to still be out about 1/16" with everything built up on the second bulkhead.
http://4.bp.blogspot.com/-aeRR3OF8enM/XGC0Vo2DuOI/AAAAAAAAGC4/l2x9qBWgoR8ykYbHfeUtaz7NwPTOGkPrwCK4BGAYYCw/s1600/IMG_1089.JPG
Should be easy enough to spilt the difference and move one hole forward 1/32" and one hole backward 1/32".
What I'm thinking of doing is avoiding drilling the 1/4" holes in the angles/webs until the Fuselage is more assembled (Just before I have to rivet in the F-728 assembly) My thinking is this scenario will help ensure that the axis bolt can be drilled perpendicular to building lines with certainty.
Any thoughts or opinions?
Anybody have any experience with this?