1. Full Ribs to Rear Spar Parts Layout July 6, 2009 http://www.zenith.aero/profile/WayneBartlett 7H2-2, Horizontal Stab Rear Spar with upper and lower doublers clecoed. 7H1-2, Stab Full Ribs

2. http://www.zenith.aero/profile/WayneBartlett Lower doubler Full Ribs to Rear Spar July 6, 2009 7H2-2, Horizontal Stab Rear Spar Note that the stab is forward up with top to edge of table. Test fit of 7H1-2, Stab Full Rib. Rib is positioned with flanges pointing outboard with web of spar adjacent to and in contact with the ends of the doublers.

3. http://www.zenith.aero/profile/WayneBartlett Lower doubler Full Ribs to Rear Spar July 6, 2009 7H2-2, Horizontal Stab Rear Spar Line made by drawing along the edge of the now-removed full rib flange Rivet line, drawn halfway between the rib edge marking and the ends of the doublers Four rivet locations marked; note that the top and bottom rivets are located in line with the doubler rivet lines. Upper doubler

4. http://www.zenith.aero/profile/WayneBartlett Full Ribs to Rear Spar July 6, 2009 7H1-2, Horizontal Stab Full Rib Rivet line drawn on rear flange of full rib

5. http://www.zenith.aero/profile/WayneBartlett Full Ribs to Rear Spar July 6, 2009 7H2-2, Horizontal Stab Rear Spar Rivet line on full rib’s rear flange was sighted through this hole, drilled #40 bit, and clecoed. This hole is used as a pivot to square the rib against the spar. Note that the view here is from aft, with top of assembly to top.

6. http://www.zenith.aero/profile/WayneBartlett Full Ribs to Rear Spar July 6, 2009 7H2-2, Horizontal Stab Rear Spar Rib was squared to the spar using the top hole drilled and clecoed as a pivot. Note that the view here is from the front, with top of assembly to top.

7. http://www.zenith.aero/profile/WayneBartlett Full Ribs to Rear Spar July 6, 2009 7H2-2, Horizontal Stab Rear Spar After squaring the rib against the spar, the bottom hole was drilled and clecoed, and then the in- between holes were drilled. Note that the view here is from aft, with top of assembly to top. This same procedure was used to locate and drill the holes for the other full rib at the other end of the doublers.

8. Summary of Work to This Point July 6, 2009 Rudder: - Assembled, in storage - Forward spar drilled for ribs and rivets - Lower doubler drilled for rivets - Upper doubler drilled for rivets - Front horizontal stab attach brackets made - Locate and drill two rear ribs for attachment to spar - Locate and drill nose rib for attachment to spar - Make end rib attach brackets - Locate and drill end rib attach brackets - Locate and drill horizontal stab front mounts - Finish drilling holes in end brackets for forward stab - Locate and drill upper and lower doublers to rear spar - Locate and drill rear ribs to rear spar Tail:- Locate and drill full ribs to rear spar Tail:- Trim forward spar end brackets to match curve of full rib at meeting point Done Done Here Next Up http://www.zenith.aero/profile/WayneBartlett