This might be obvious to some, but I wanted to share a time-saving tip.
When drilling the j-stringers to the lower aft fuselage, the manual instructs the builder to hang a plumb bob from each of the bulkhead tooling holes after leveling the fuselage on the sawhorses. The problem is the tedium of checking each hole over and over when wrestling the holes to line up, especially with the thick and difficult lower tail cone skin, and the plumb bob method only allows checking one bulkhead at a time.
A cheap laser level, on the other hand, can be positioned to hit all of the tooling holes simultaneously, and can be left on through the whole clecoing process to provide a quick twist check at any time.
Hope it helps!
When drilling the j-stringers to the lower aft fuselage, the manual instructs the builder to hang a plumb bob from each of the bulkhead tooling holes after leveling the fuselage on the sawhorses. The problem is the tedium of checking each hole over and over when wrestling the holes to line up, especially with the thick and difficult lower tail cone skin, and the plumb bob method only allows checking one bulkhead at a time.
A cheap laser level, on the other hand, can be positioned to hit all of the tooling holes simultaneously, and can be left on through the whole clecoing process to provide a quick twist check at any time.
Hope it helps!
