SECTION 26: MID FUSE RIBS & BOTTOM SKINS: Difference between revisions

=== Discussions ===

* [https://vansairforce.net/community/showthread.php?t=217809 VAF thread on chapter 26 errors]

* New Flap Motor Variant

The forward edges of the F-1066C-2-L and F-1066C-2-R reinforcement angles are not flush with the forward edge of the seatbelt attach bar horizontal extension, rather they hang over a bit. They would sit flush if left and right angles were switched, however the plans say otherwise.

If you have part F-1016D (seatbelt strap) with an extra tab on the side and two additional holes but your manual depicts that part without flanges/extra holes, you are experiencing the transition from the old flap motor to the new flap motor where the tab is no longer needed. Your manual is a new version but Vans sent you the older part with the tab. According to Vans, just remove the tab and match drill the two extra holes and use same rivets as the other surrounding holes. For details, see this FB thread [https://www.facebook.com/groups/vansrv10/posts/4880956025358791/ (FB Link 3/28/2022]) and [https://www.facebook.com/groups/vansrv10/posts/4891736740947386/ (FB Link 4/1/2022])<br>'''If your plans don't match what you have, check the electronic version of the plans which should show up under your name in the vans store.

[[File:26-3gotcha.png|426x426px]]

There are plans provided as Rev 0, dated 7/24/14, that accidentally show the seat belt fitting on the wrong side of the left outboard rib. A correct page 26-4, also marked Rev 0 and with same date was on the thumb drive of some builders. The newest version provided on their website, marked as Rev 1 dated 2/24/22 shows it also on the wrong side. However, the detailed figure on page 26-2 shows it correctly.

Step 5: it doesn't explicitly say anything about fluting the F-1018-L and F-1018-R ribs. Even if it did, I might have assumed if it was straight it was good. Well, it turns out that it needs to not be straight to match the holes in the bottom skin. It is a real pain to try to flute it later.

Also consider marking and cutting/installing antenna doublers on the bottom skins in this general section.  This will be much easier now than later, when the seat plates are permanently riveted in place.

This is when I realized that I had the brackets swapped on my fuselage bulkhead assembly created at the end of Section 25. Make sure the vertical bulkhead components are more or less perpendicular to the bottom bulkhead and not leaning outward. Now is the time to fix this if it is incorrect.