Progress … was able to get a few good hours in and now have all the nose ribs riveted except for two. While pounding the nose rib aft flange rivets into submission with the rivet gun and watching the nice anodizing on the rivets get pummeled, a thought came to mind. Interestingly, decided to try using some Boelube on the rivet set and it works rather well!
Top three rivets were pounded with the rivet gun
as usual and the bottom rivet was pounded with Boelube on the rivet set.
Above is a photo showing the top three rivets
set without Boelube on the rivet set and the bottom rivet was pounded with
Boelube on the rivet set … big difference, so the rest of the pounded rivets
are now receiving a small drop of Boelube on the rivet set prior to being
pounded with the rivet gun.
Riveting the forth rib from the inboard end of
the left spar.
SPEED BUMP – Up until this point all the ribs
have been able to be riveted with solid rivets. Unfortunately, the second and
third ribs from the inboard end of the spar will need to receive some LP4-3 pop
rivets. The four rivets securing the aft flanges of these nose ribs onto the left
wing spar can still be solid rivets, but the six rivets attaching the web of these two
nose ribs to the rib clips will need to be LP4-3 pop rivets. There is a clearance
issue because the body of the pneumatic rivet squeezer is hitting on the rib
clips where the extra rib is for the wing walk area. The interference prevents
the squeezer from being able to get squarely (or even close) on the rivet head.
At least the four rivets that secure the nose rib's aft flange onto the spar can be pounded, so I don’t
feel quite as bad about it.
One can clearly see the body of the pneumatic
squeezer hits the rib clips
preventing the squeezer from obtaining proper
alignment with the rivet.
Luckily the pneumatic squeezer just barely fit
on the rivets securing the inner most inboard rib to the rib clip. Was able to
use four solid rivets on the rib but had to use LP4-3 pop rivets on the upper
and lower holes because the large spar rivets prevented the squeezer from
gaining access to the rivets at those two locations.
The inner most inboard rib with four solid
rivets and two LP4-3 pop rivets.
I thought briefly about possibly pounding
rivets where the squeezer could not fit but after testing with some scrap metal,
decided it would not be a good idea. Pounding 1/8” rivets with an offset rivet
set into thin .020 metal results in dented material. I tried several techniques
and did not find a way that worked for me to pound a 1/8” rivet correctly AND have no metal
deformation. Not saying it can’t be done,
but it is beyond my current skill set.