snoopyflys
Well Known Member
Anybody experienced this while working on the aft fuselage?
Prior to drilling the SB aft fuse components, the overall twist measurement between the F-706 and F-712 bulkheads was dead on center with the tooling holes. Now after drilling, disassembling, deburring, dimpling...(the stuff we all love to do), I reassembled and a final twist check revealed a slight twist for and aft. I can remove this "new twist" with slight very light hand pressure or shimming the fuse left-side near the F-706 bulkhead and on the right-side of the F-712 bulkhead.
Since the plans call for no twist in the fuse prior to drilling, will this "new twist" just work itself out while riveting or lock it in place? Is there a level of acceptable post-drilling twist tolerance or am I worrying about something that the top skin will correct when its rivited in place?
FUD (Fear, Uncertainty, Doubt) has struck again .
Prior to drilling the SB aft fuse components, the overall twist measurement between the F-706 and F-712 bulkheads was dead on center with the tooling holes. Now after drilling, disassembling, deburring, dimpling...(the stuff we all love to do), I reassembled and a final twist check revealed a slight twist for and aft. I can remove this "new twist" with slight very light hand pressure or shimming the fuse left-side near the F-706 bulkhead and on the right-side of the F-712 bulkhead.
Since the plans call for no twist in the fuse prior to drilling, will this "new twist" just work itself out while riveting or lock it in place? Is there a level of acceptable post-drilling twist tolerance or am I worrying about something that the top skin will correct when its rivited in place?
FUD (Fear, Uncertainty, Doubt) has struck again .