SECTION 25: MID FUSE BULKHEADS

Build Instruction Updates

• 01/07/21 25_10.pdf

Check for more recent updates here

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F-1004C-L and F1004C-R

Step 8 details the assembly of the bulkheads to the center section prior to deburring and priming these parts. Now is a very good time to consider whether you will need additional pass-through holes in the bulkheads for items like conduit, pitot, static, and AoA sensor tubing, air conditioning lines, and other electrical circuits. Many builders find that the two holes referenced here and on #PAGE 25-4 are insufficient for all of the required lines and circuits for an RV-10, especially if it is going to have a full glass panel and backup/redundant electrical systems.

Do yourself a favor and read forward in the plans to Sections 29 and OP-37 (even if you do not use the Van's provided wiring harness, OP-37 is very useful in understanding the options for routing electrical circuits).

Later in the build, especially after the side skins are installed, it is quite difficult and awkward to cut new holes for conduit or other pass-throughs. Installing caterpillar or snap bushings can be awkward later, too. You will save considerable time later by thinking ahead at this point.

See also Section 26 where the F-1017 under-seat ribs can be much more easily modified before installation to allow conduit and antenna installation, which might not be done until Section 35 or later.

ENSURE that any additional holes you cut in the bulkheads are properly spaced and, if needed, reinforced per the guidelines in AC43.13.

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• Step 6
  Step 6 requires you to 'Rivet the Mid Seat Rail Support Subassemblies, F-1004C-L and -R Center Section Bulkheads and F-1004N Stiffener Angles to the F-1004A Center Section Bulkhead per the callouts in Figure 2.' Figure 2 in the plans (Rev 1 Date 1/7/21) omits the quantity and rivets to be used. The older plans (Rev 0 Date 7/24/14) shows the rivets and places.
• Step 7
  Don't insert the snap bushings instead widen the two holes to a bit larger than .75 inches (.77) so they can pass through Van's conduit later. Also drill a third / forth hole with same diameter underneath the two holes for a more conduits if desired.

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• Step 4
  Don't insert the snap bushings instead widen the two holes to a bit larger than .75 inches (.77) so they can pass through Van's conduit later. Also drill a third and forth hole with same diameter underneath the two holes for more conduits.

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• Enlarge the two holes at the lower corners of F-1005A to a bit larger than .75 inches (.77) so they can pass through Van's conduit later

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• Enlarge the two holes at the lower corners of F-1034A to a bit larger than .75 inches (.77) so they can pass through Van's conduit later