Riveted the Bottom Skin

Almost riveted all the holes that I was supposed to on the bottom skin. I even managed to not rivet all the holes I wasn’t supposed to.

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These two holes were blocked by stiffeners.

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I can’t fit my bucking bar in there. Maybe time to invest in some more bucking bars.

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Update: I just ordered this from spruce… Hopefully it will get in there. If not, I’ll stick a couple of pop rivets in there and call it a day.

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Today’s Time (hours): 1.5
Empennage Time (hours): 153.5
Total Time (hours): 153.5

 

Bulkheads Riveted

Clecoed and riveted the F-01412 aft bulkhead and tie down bracket.

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Clecoed and riveted the F-01411 bulkhead and aft horizontal stabilizer attach bars.

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Clecoed and riveted the F-01410 bulkhead and forward horizontal stabilizer attach bars.

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Clecoed and riveted the F-01407 bulkhead.

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Clecoed and riveted the F-01408 bulkhead and rudder cable bracket. Also added the stiffener clips to the bottom of the bulkhead. I believe that these were added to revs of the kit that came out after service bulletin 18-09-17 was issued to address cracking in the forward bottom skin.

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Riveted nut plates to the battery angles. So why are these called battery angles when they have absolutely nothing to do with the battery? In fact the battery isn’t even located in the tail. My guess is that these parts were originally part of the RV-10 kit. The RV-14 borrows parts from other RV’s. So while in the RV-14 they are part of the aft bell crank assembly, in the RV-10 I’ll bet they formed part of the battery box and simply retained their part number and name when they were introduced to the RV-14. If anyone knows for sure, please comment.

The forward nut plate holes do not get nut plates as they are not applicable to the RV-14.

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Riveted the battery angles to the bell crack ribs.

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Riveted nut plates to the F-01406B bulkhead.  Note the discolorations at the bottom of the bulkhead. I managed to scratch the primer moving the part before it was fully cured. So I touched it up. Apparently re-shooting P60G2 creates this discoloration. It seems to have dried properly and doesn’t seem to be problematic; just unsightly.

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Riveted bell crank ribs to the F-01406B bulkhead.

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Clecoed and riveted the F-01407 bulkhead to the bell crank ribs.

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Dimpled the forward bottom skin with the DRDT-2

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Lots of dimples!

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Dimpled the stiffeners.

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Clecoed the bell crank ribs, bulkheads, and stiffeners to the bottom skin.

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Ready to Rivet!

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Today’s Time (hours): 5.0
Empennage Time (hours): 152.0
Total Time (hours): 152.0

 

Primed Tail Cone Parts

I peeled the blue vinyl from the j channel that’s formed into the edges of the bottom skin so that I could scuff and prime those along with the inside of the skin.

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First batch of four ready to shoot.

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Second batch was the rest of the bulkheads and bell crank ribs (not pictured) and the third batch included the longerons and stiffeners. The last batch was the bottom skin.

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Et viola!

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Tomorrow I’ll begin assembling the tail cone. Once I get the substructure assembled and riveted to the bottom skin, I’ll have one more big scuff and prime session for the skins and the few remaining substructure components.

Today’s Time (hours): 3.0
Empennage Time (hours): 147.0
Total Time (hours): 147.0

 

Whole lotta scuffin’

I cut the aft tail skin with the snips. Cutting .040 aluminum with snips is a workout. I thought of using the band saw but it’s an awkward part to cut straight with the saw. I trusted my skills with the snips more than steadiness of my hand at the band saw. Good result but my forearm was pretty sore afterward.

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Cleaned it up with file and sand paper.

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My paint cutter arbor arrived from Aircraft Spruce. So I was able to cut the remaining countersinks in the rudder stops without the cage.

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I was skeptical that I’d be able to hit the right depth free hand but it worked out fine.

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I also heard back from Van’s support on the holes that I thought shouldn’t be dimpled and in fact they shouldn’t have. So I hammered them flat. This was definitely an error in the plans. Now my tie down bracket sits flush.

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And finished up with a marathon scuffing session.

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I’ve got to be honest. Scuffing parts is my least favorite part of the process. It’s dusty messy work.

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That was a lot of parts to scuff but I’m glad I fought through and got them done. This is most of the parts for the tail cone. Once these are primed, I’ll only have the skins and a few small parts left to scuff and prime in order to complete the empennage. Big priming session tomorrow. Then I can start assembling. 🙂

Today’s Time (hours): 3.0
Empennage Time (hours): 144.0
Total Time (hours): 144.0

 

More work on bulkheads

Modified the bottom of the 1408 bulkhead.

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Deburred and dimpled all the 1407 and 1408 bulkhead parts.

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Separated, deburred, and dimpled the bell crank ribs.

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I realized when I went to drill the battery angles that I somehow modified the wrong one. I could swear that I marked these parts carefully before I separated them but it appears I switched the A and B markings. I don’t think this will be a problem though. I just needed to modify the correct one. The modification to the wrong one is not consequential.

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Once I fixed that, I drilled and countersunk all the nut plate holes and match drilled the angles to the bell crank ribs. I deburred and dimpled the 1406 bulkhead as well.

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I think next weekend I’m going to have two solid days of scuffing and priming all these parts.

 

Today’s Time (hours): 4.0
Empennage Time (hours): 141.0
Total Time (hours): 141.0

 

Finished Elevators and Worked on Aft Three Bulkhead Assemblies

Yay! Rivets came in the mail and I was able to finally complete the elevators.

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Cleaned up the edges and deburred the longerons and J stiffeners.

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Matched drilled the aft bulkheads to the VS aft spar.

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Countersunk the tie down support.

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Dimpled the bulkheads. I think I found a problem with the plans. They called for dimpling the #30 holes in the web of the bulkhead. Note the two dimples along the edge of the tiedown bracket. they are keeping it from sitting flush against the bulkhead. I’ll likely need to undimple these holes somehow.

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Match drilled the next bulkhead to the HS attach bars and dimpled the flanges.

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Likewise with the next bulkhead…

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Ready for deburring, scuffing, and priming.

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Today’s Time (hours): 6.0
Empennage Time (hours): 137.0
Total Time (hours): 137.0

 

Fabricated the HS Attach Support and Rudder Stops

I cut the horizontal stabilizer attach bar support angle from the provided aluminum angle. I measured it out with the calipers, marked it. Drilled stop holes in the inside corners and used the bandsaw to remove most of the material. I finished removing material with a vixen file and cleaned it up on the scotch brite wheel.

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Made the rudder stops from the provided aluminum angle. I measured with calipers, marked up the angle and cut it on the band saw. I cleaned it up with a file and the scotch brite wheel.

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I machine countersunk the top two holes in each rudder stop. I was totally stumped on how to countersink the other two holes on the inside of the angle. The countersink cage won’t fit. After some head-scratching I gave Jared a call to see what he did.

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Apparently theres a thing called a “paint cutter arbor” that has the same threading as the countersink cage and one can mount the countersink cutter into it and mount it in the drill press. So I ordered one from Aircraft Spruce.

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Today’s Time (hours): 2.5
Empennage Time (hours): 131.0
Total Time (hours): 131.0

 

Pitch Trim Servo Installed

I got back from my work trip to Toronto this evening and my new Molex connectors and pins had arrived. So I was able to crimp on the last pin and push the pins into the connector. Then I installed it into the elevator and connected the pushrod to the trim tab horn with a clevis and cotter key.

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You can also see where I safety wired the trim tab hinge pin in place. As soon as I get the rivets I ordered from Aircraft Spruce, I’ll be able to complete the elevators.

 

Today’s Time (hours): 0.5
Empennage Time (hours): 128.5
Total Time (hours): 128.5

 

Began Work on the Aft Fuselage

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The aft fuselage build begins with cutting and trimming parts. Separated the rudder cable guides.

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Separated the various j-stiffeners, longerons, and battery angles. Modified several of the parts according to the plans. Dimpled a couple. And straightened the HS attach bars.

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This was the first nice flying day we’ve had in the Atlanta Area in a week or so. So Sophie and I took advantage and did a little sightseeing in the Skyhawk around north Georgia. Absolutely beautiful flying day.

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We also paid John and Bernie a visit in the McCollum control tower after we got back and things had slowed down a bit at the airport.  They really had their hands full today. It was very busy with the nice weather. On the way out we were one of six flights waiting for departure and they had three in the pattern, several arrivals inbound and a transitioning aircraft all at the same time. These guys are awesome at what they do.

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Today’s Time (hours): 2.0
Empennage Time (hours): 128.0
Total Time (hours): 128.0

 

Four out of Five Ain’t Bad

My new molex crimper arrived from amazon along with the new automatic wire stripper. Yay! New tools.

These Molex MicroFit  pins are teeny tiny. I managed to crimp four out of the five pins on to the wires from the trim servo correctly. Unfortunately there was only one extra pin provided and I already burned through that one on my first attempt. So I ordered a bunch of  extra molex pins and housings.

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Today’s Time (hours): 0.5
Empennage Time (hours): 126.0
Total Time (hours): 126.0