Work resumes on the tanks

I received the J-Channel that that I ordered from Van’s. I cut it to length with a cut-off wheel in the Dremel. Then cleaned up the edges on the Scotchbrite wheel. I measured and marked the centerline. Drilled the starter hole. Clecoed it in place and match drilled the rest of the holes, clecoing as I went.

 

I clecoed the baffle in place and machine countersunk the corresponding rivet holes in the tank skin.

 

I disassembled everything final drilled the #19 holes in the skin and then deburred them as well as the holes in the j-channel. I dimpled the J-channel with the pneumatic squeezer.

In other news… My propeller was delivered! It’ll be a while before I need it but ordered it at the same time as the engine to get a discount. The engine has a much longer lead time. Expecting it to show up mid October.

 

 

Today’s Time (hours): 2.0
Wing Time (hours): 142.0
Total Time (hours): 353.0

 

 

Completed systems routing

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Wired the right wing for the nav, strobe, and landing lights. Also ran the wires for the autopilot servo.

 

In the left wing I ran the wiring for the nav, strobe, and landing lights. I also ran the wiring for the ADAHRS and the plastic line for the pitot tube. Decided to drill a couple of extra routing hole in order to mount the pitot tube outboard of the aileron bellcrank in order to avoid interference with the aileron push tube. I omitted the wire for the stall warning system since I didn’t install it in the leading edge. The Garmin system has an AOA sensor as part of the pitot system. So no need.

 

 

Today’s Time (hours): 3.0
Wing Time (hours): 140.0
Total Time (hours): 351.0

 

 

Installed landing lights and lenses

Cut the plexiglass lens to 3/4″ larger than the opening in the wing using the Dremel with a diamond dust blade. Cut like buttah.

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Covered the lens with tape to protect it. Put in in place within the wing and traced the opening onto the tape. I lined up the backing places and marked the tape with the finished cut lines. I cut to final size with the Dremel and sanded the edges smooth with a sanding drum in the drill press.

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Set the lens into place and used the tape “leash” i made on the front of the lens to pull it tight against the inside of the skin. Drilled and clecoed all th holes with a #30 plexi bit.

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Remove the lens from the wing and removed the tape. I countersunk the holes with 100 degree zero-flute countersink bit in the electric drill. I deburred the back side of the holes with a single turn of the same bit.

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I used VHB double stick tape to secure the backing plates to the lens.

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I installed the landing light onto the bracket that I had riveted into the wing in an earlier step.

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I secured the lens in place with #6 stainless screws.

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And then repeated the whole process for the right wing.

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This completes section 17–Outboard leading edges!

Today’s Time (hours): 4.0
Wing Time (hours): 137.0
Total Time (hours): 348.0

 

 

Primed all the tank parts.

When I bought my tools I bought my tools for this project, I decided to buy a DRDT-2 dimpler. I decided not to bother with a c-frame. Until this point I have not found anything that I couldn’t do without a c-frame. Today I needed to fill the locating holes in the inboard and outboard ribs with AN470AD6-5 rivets. I don’t own any tool capable of setting those big rivets reliably. Fortunately Jared offered up his c-frame and I went to his house and got these rivets set. Thanks, man! Ended up cutting the rivets down to like a 6-3. They are not structural and they were way to long.  They just plug up the machining holes in the external fuel tank ribs. The shorter rivets set perfectly with the c-frame and a heavy hammer.

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I primed the exterior side of all the fuel tank parts.

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I riveted the bearings for the aileron controls to the tank attach bracket.

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I riveted the shims and nutplates to the tank attach brackets.

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I riveted the nutplates to the aft inboard ribs. I couldn’t get a mushroom set in between the clecos to rivet these. So I used a back rivet set on the tail and a bucking bar on the factory head.

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I’ve completed everything I can on the Tanks until I get the J-Channel I ordered from Van’s. On the bright side… I received the tools I need to install the landing light lenses so that will be tomorrow’s project.

Today’s Time (hours): 3.0
Wing Time (hours): 133.0
Total Time (hours): 344.0

 

 

Work continues on Fuel Tanks

Final drilled the tank attach Z brackets and machine countersunk the nutplate attach holes. I cut the brackets apart on the band saw and cleaned up all the edges on the scotchbright wheel. I riveted the nutplates in place with the squeezer.

 

 

I machine countersunk the fuel filler flanges.

 

 

I separated the shims with snips and deburred on the scotch bright wheel. I clecoed the the shims to the tank attach brackets and trimmed the ends to be flush with the brackets with snips and cleaned up the edges on the scotchbright wheel. I final drilled all the holes in the shims and dimpled them with the squeezer. I machine countersunk all the holes in the flanges of the attach brackets.

 

 

I came up short on J-channel. Not sure whether I didn’t cut the stock I had efficiently when making up the wing stiffeners or if I missed something in inventory. Either way I don’t have anything long enough to make the two 54″ tank stiffeners. I ordered a couple more pieces from Van’s. Should be here next week some time.

 

Today’s Time (hours): 3.0
Wing Time (hours): 130.0
Total Time (hours): 341.0

 

 

 

Prepared tank stiffeners

Dimpled the nut plate attach holes in the inboard tank ribs.

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Separated the stiffeners.

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Used snips to make all the cuts. Doh! Should have peeled the blue vinyl off before I cut them.

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Then cleaned them up on the scotch bright wheel, scuffed the mating surfaces and dimpled.

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Today’s Time (hours): 2.0
Wing Time (hours): 127.0
Total Time (hours): 338.0

 

 

 

Started work on fuel tanks

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I ordered plexi bits and a zero flute countersink so that I can fabricate the landing light lenses. While I’m waiting for those to show up, I started on the tanks.

Fluted and straightened the tank ribs yesterday. Final drilled all the #40 and #30 holes in all the ribs tonight.

Located and drilled the 3/4″ hole specified in the plans.

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Match drilled the rivet holes from the finger strainer flange in the inboard ribs.

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Dimpled all the holes in the top and bottom flanges of all the ribs.

 

Today’s Time (hours): 2.0
Wing Time (hours): 125.0
Total Time (hours): 336.0