The first decision is what kind of opening do I install for the trim tab. Reviewing the work of the RV clan shown opposite requires a lot of flush riveting and rivet nuts and I did not wish to invest the time required.The decision was to manufacture externally mounted plate secured by M3 pan head screws fitted to rivnuts similar to the inspection hatch at the rear of the aircraft.
Trim Tab
A reinforcing plate was fabricated from 2024-T3 aluminium to mount under the clevis attachment supplied by the factory. The flanges were folded 15 mm and trimmed to fit inside the tab.
The shaft center was marked and the plate was attached using 0.005" double sided film adhesive to the inside face of the trim tab. The plate is located on its own center and about the shaft center line
The tape will hold the plate in position for riveting. OK - I was out of rivets and wanted to close the tab to allow the installation of the drive.
The location of the plate was marked onto the lower skin and 3 [three] 3/32'' pop rivets installed at each pitched 5 mm from the edge and at 30 mm centers. The clevis attachment will be fitted once the MAC trim drive is installed in the elevator.
The drive installation will be covered in the next blog post.
No comments:
Post a Comment