F7108A Center Forward Fuselage Rib, DWG 24
There's a "Gotcha" on the cabin substructure. Maybe common to both Slider and tipper but for sure on the slider. I assume it is because the Firewall is common to both and the substructure is different.
Here's how it goes.
Manual says, cleko and drill F7109 Plate to F7108B Angle and F7108A Center Forward Fuselage Rib. No way to follow the manual here. It says to cleko the rib to the Firewall, but there are no holes in either. It also says to drill the F7108B Angle to F7108A Center Forward Fuse Rib, but the angle has to fit perfectly to the firewall and F601L Stiffener or the skin holes won't match the rib. The best solution is to assemble all the parts with the skin first. This pulls everything into the exact location.
First clamp the center rib forward flange to the left forward flange and duplicate the holes. Now the rib has holes for the Firewall. Cleko the ribs and subpanels but leave F7108B Angle out for now. Cleko the skin.
There's a trick to getting the skin in place. Start in the center. Work out in all directions with 100% clekos. When you get to the curve by the side skin, start at the forward #30 holes and work aft one hole at a time with 100% clekos. Leave it overnight. Back to the substructure...
Draw a 1/4" edge distance line on F7108B Angle. The Aft two holes are 3/16" so draw a line 3/8" edge distance line on the aft end for those two holes. Slide the F7108B Angle in place. Position F7108B Angle on F7108A Rib and mark one forward and one aft hole. Remove it and look at the edge distances. Adjust as needed so the holes fall within edge distance. I had to make an .063" shim between F7108B Angle and F601L Stiffener then file the slot in F7105A Rib. Once all the holes are good, clamp the angle to the rib and mark the hole through the F7108B Angle on F601L Stiffener. Disassemble. Match drill the angle and remove. Drill the hole in F601L Stiffener. Reassemble. Now all the parts are in position and the firewall can be match drilled through the rib or marked and drilled later with a super sharp drill bit. Don't mess with the hole in the top corner of the angle. Since this matches the other rib, just cleko the other rib to the forward side of the firewall, mark, remove and drill it from the front.
Estes Park, CO
wirejock at yahoo dot com
Donated 12/01/2017. Plus a little extra.
RV-7A #73391, N511RV reserved (1,800+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
Last edited by wirejock : 02-26-2018 at 01:47 PM.