02-12-2026, 01:43 PM
Any particular engineering reason the hole spacing for the ballast weight mount to the weldment in the tailboom have different edge clearances?
I'm building an A600 from parts gathered hither and yonder. Most Brand new parts, some previously installed but none ever completed. This is the case with this mount. It was previously drilled and the hole placement by the previous person was 5/16 on both edges. The drawing show a different edge clearance on the forward hole? I'm thinking a 16th of an inch in this application is not critical as it still falls within normal edge clearance limits.
![[Image: ballast-weldment-mount-holes.jpg]](https://i.ibb.co/S4YZg4Jk/ballast-weldment-mount-holes.jpg)
I'm building an A600 from parts gathered hither and yonder. Most Brand new parts, some previously installed but none ever completed. This is the case with this mount. It was previously drilled and the hole placement by the previous person was 5/16 on both edges. The drawing show a different edge clearance on the forward hole? I'm thinking a 16th of an inch in this application is not critical as it still falls within normal edge clearance limits.