Fuselage Cradle and Fuse Side Skins 29-1 to 29-3-4, 29-4-4, 29-11-1

Prior to heading to Oshkosh for Airventure 2025, I decided to build a fuselage cradle following these plans that were referenced on rv10.org. I had previously purchased all the required lumber and cut it to length, so it was a matter of just following the provided instructions for assembling everything together.

I did, however, make a couple of small changes as I put the cradle together. These are described in the photo captions below.

Fuselage cradle lumber cut to size

The first modification I made was to widen the space that holds the spars to accommodate the 6" spar alignment rods

An advantage of widening this space is that the side pieces can be unscrewed for riveting the side skins in this area in section 29 without having to move the fuselage

I also modified the rear support as suggested in the RV-10 wiki. This will allow me to remove it later for riveting the tailcone. Here I have the fuselage supported by some foam to give me room to cleco side skins when I get to attaching those in section 29

After returning from Oshkosh, I started on the infamous section 29 with all its bending, rolling and twisting. I started by pulling out the longeron angles making sure that I had the correct lengths selected. I then cut them to length, and marked them in various locations for bending and twisting. 

Bare aluminum angles that will form the fuselage longerons. Make sure to select the correct length which are just slightly longer than the cut lengths called for in the plans

Longerons marked for bending and twisting locations, and a rivet line along each outer side, 5/16" in from the edge

I then began bending the aft longerons to conform to the provided template. This took some time (up to 2 hours per longeron), but I was careful to match the template bend as closely as possible as this bend will define the shape of the fuselage.

Although bending the longerons took time, it wasn't very hard and I was able to match the template to within 1/64" along the entire bend. The only additional step I had to perform while bending was to occasionally rotate the longeron 90 deg. in the vice to remove the induced vertical bend that had been imparted into the longeron while hitting it with the mallet.

Bending the aft longerons while frequently checking the bend with the provided template

Longeron bend complete and matches the template perfectly. Only 3 more longerons to go!

After completing each longeron bend, I match drilled the required holes from the template into the top of the longeron. The aft left longeron requires some additional holes drilled for the baggage door seal angle that are not required in the aft right longeron

Both aft longerons bent and match drilled

Aft longerons attached to the fuselage rear seat brace and gussets. The match drilled holes aligned perfectly.

Starting to see the shape of the fuselage!

Next I worked on bending the main longerons. These extend from the firewall to the tail cone with the left one being slightly shorter to accommodate the baggage door on that side. These were bent and match drilled for the mid cabin decks using the same template. Again bending was fairly straightforward, albeit slow, with the additional step of adding a twist at the front of each longeron, and an additional twist at the rear of the right longeron.

Right main longeron being match drilled from the template after bending

Right longeron bent, twisted and fitted to fuselage. The predrilled mid cabin deck holes lined up perfectly with the match drilled holes from the template into the longeron, and the longeron fit easily into the openings in the bulkheads

There is one hole at the front of the mid cabin deck that needs to be match drilled in place as that hole is not present in the template

Bending and match drilling the left main longeron. This longeron also needs a twist, but only at the front

All longerons clecoed in place, and the fuselage shape looks good. I also temporarily clecoed the side skins in place to make sure everything aligned, and it all looks good!

All side skins temporarily attached prior to bending the bottom curves. More fun to come!


Fuselage Cradle Time Taken:          7.0 hours
Fuse Side Skins Time Taken:         14.8 hours

Dates:                July 7 2025 - August 6 2025

Fuselage Cradle Total Time:        7.0 hours
Fuse Side Skins Total Time:       14.8 hours
RV-10 Build Total Time:         1101.3 hours

Priming Total Time:             134.8 hours (not included in build time totals)