jeffw@sc47
Well Known Member
Elevator trim tab assembled though (09-14, Step 6) to riveting the trim tab hinge onto the tab front spar/top skin and letting tank seal to set on the three foam ribs inside. Has set aside for 24 hours on flat slab with trailing edge aluminum square tube clecoed to TE and weights and flat 1x4 set on top.
Then the next instruction is - 'NOTE: Check for twist before riveting [trailing edge].'
There is a minor twist, about 1/16" to 3/32" across length of EL trim tab: found twist, now how do I correct it?
The TE filler strip is pretty set in with double sided tape strips and I guess the foam blocks are pretty set in their beds of tank-seal.
QUESTION_1: Is there any procedure for mitigating or reversing any of this twist before riveting the TE?
I understand that this twist is minimal, but it's across the very short length of the trim tab. If i have 1/4-3/32 twist in 24", I realize I have to be especially careful with the elevators, ailerons, and flaps to avoid twist in those longer items.
QUESTION_2: What procedures do I follow, besides clecoed angles on TE's and weights to keep things flat/straight, for avoiding twist?
Searched throughout threads for these procedures but haven't found the answers I would like to see; mostly ideas for trying to fix twists already set-in.
Then the next instruction is - 'NOTE: Check for twist before riveting [trailing edge].'
There is a minor twist, about 1/16" to 3/32" across length of EL trim tab: found twist, now how do I correct it?
The TE filler strip is pretty set in with double sided tape strips and I guess the foam blocks are pretty set in their beds of tank-seal.
QUESTION_1: Is there any procedure for mitigating or reversing any of this twist before riveting the TE?
I understand that this twist is minimal, but it's across the very short length of the trim tab. If i have 1/4-3/32 twist in 24", I realize I have to be especially careful with the elevators, ailerons, and flaps to avoid twist in those longer items.
QUESTION_2: What procedures do I follow, besides clecoed angles on TE's and weights to keep things flat/straight, for avoiding twist?
Searched throughout threads for these procedures but haven't found the answers I would like to see; mostly ideas for trying to fix twists already set-in.