Pitot, Lower Skins, and a Fuel Tank

It's been productive around here...I really want to finish these wings.
Tue 18th  - 1.5hrs - Started aileron actuation section, cut and drilled long pushrods
Wed 19th - 1.25hrs - Drilled RH lower skins
Fri  21st   - 2.5hrs - "Deburr Party" deburred all lower wing skins
Sat 22nd  - 5.5hrs - worked on pitot mount, worked on pushrods
Sun 23rd  - 6.5hrs - Primed parts, installed RH Fuel Tank, riveted pitot mount, worked on push rods

Total time for this post = 17.25hrs 

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My Dynon stuff arrived! It was like Christmas in June.

I received the heated/AoA pitot tube, it's controller box, the autopilot roll servo, mounting bracket and wiring kit. Everything look to be of very high quality. Really nice pieces of equipment....good job Dynon!

The servo just has 7" or so of wire coming from it, nothing has a connector installed. So my first order of business, with my new avionic,s was to install the connector on the servo and on one end of the wire bundle. The wire bundle will run down the conduit I installed in the wing and therefore one end of the wires need to remain without a connector installed to fit through the conduit. Having never installed a connector and it's pins before I recruited Mike, a coworker and friend of mine who happens to be an electrical engineer dealing with avionics integration everyday, for help. So I walked down the hall to Mike's office for a lesson on pinning connectors. Turns out it's really easy and we finished the job on our lunch break.        

No problems installing the connectors to the servo.

Drilled out the RH lower skins.

Installed the RH Fuel Tank.

 

Friday night the wife and I had a "Deburr Party", yep it's what you think it is, you stand around and deburr wing skins into the wee hours of the night. Of course the party can't get started until the baby is sleeping. Grab the monitor and sneak out to the shop, she'll never know we were gone : ). We finished all of the lower skins in a single night!

I got a lot of the aileron actuation section complete as well. I cut and primed the push/pull rods and attached the ends, which I etched and alodined, looks nice.

 

 

I needed to mount the pitot controller near the pitot tube so I made a mounting plate to attach to the rib. It rivets into place using four 470AD4 rivets which minimizes the size of the holes cut into the rib. The controller then screws into place using four #6 screws into the nutplates. There are two angles attached to the back to stiffen the plate and provide attachment points for Adel clamps to hold the pitot and AoA lines and wiring. The power wires run from the bottom of the controller and are held in place by an Adel clamp mounted on a spacer to the hole on the lower side of the mount (LH side of the picture below). More pics of the installation will come later when I get everything finished up.

Here is the single picture I have of the install more pics will follow when I finish up the wiring and such...kinda looks like a mess right now.

Finished Flaps and Other Stuff

I finished up the flaps on Saturday. These were a really easy build and they look great. I riveted the trailing edges with proseal and with the rivets altering directions, facing up, facing down, facing up.... I did this to prevent any warping in the part during riveting. (I also did this on all the other trailing edges I have made, so nothing new). I laid some blankets down inside the fuselage and stored them in there for now.

Saturday June 15th - 4.25hrs - Finished Flaps, Riveted trailing edges.
Sunday June 16th - 5.25hrs - drilled skins, pitot tube mount, drilled holes for pitot lines, installed fuel tank

Finished Flaps Total Time = 26.25hrs

I installed the LH Fuel Tank yesterday, RH will come later. This was easier than what I thought it was going to be. I imagined lots of sweat and grunting to be required, but everything lined up really well. I first spaced them up using boards underneath the jigs they were sitting in and then after lining up the first hole I inserted a cleco into the nutplate to hold that end. I then raised the other end and did the same. I few more clecos and everything was lined up. Then I started installing the 56(?) screws...there were a lot.

I drilled out the LH skins and I got some help marking holes I drilled. Then we did the big cleco migration, where every cleco moves over one hole, to final drill the unmarked hole it was previously installed in.

 

 

 

The pitot/AoA lines are installed. I am using the Pitot/Static kit from SafeAir1. It provides tubing, connector, etc for cheaper than if you buy the stuff seperately (trust me I researched it). The tubing is nylon and can withstand -40F to 200+F, very durable. I had to drill new feed through holes for the green line, which will be my pitot line. The blue line will be my AoA line and I used the existing feed throughs made per the plans.

 

 

I worked on my pitot mast installation. I am using the Gretz pitot mast kit to install the Dynon pitot. The instructions for the install are decent, but it leaves a lot up to you, which was fun.

I used an old rib part I messed up on to scavenge an angle bracket.

Here are the 2 main parts. The angle bracket and the backing plate. (Note: This pic was post drilling, the parts don't come with holes)

 

I match drilled the backing plate to the spar first, removed it, then clecoed the skin in place. Reclecoed the plate to the spar on the outside of the skin and with the angle bracket clecoed to the spar I match drilled through the plate, skin, and bracket at the same time.

A picture with the parts clecoed in place. The skin will install over this.

I am installing in the third bay from the wing tip on the outboard rib.

More Flaps

The upper flap skins are completely riveted on and the lower skins are attached to the spar. You have to pull the skins apart and slide your hand into the flap, like a glove, to hold the bucking bar for the spar rivets. The leading edge ribs are blind rivets which makes for quick and easy work on those. The rest of the lower skin rivets are blind rivets, so that'll be nice. Next step is the trailing edge and that means more ProSeal...yay. Almost done though, I expect to finish these up this weekend. My Pitot/Static lines showed up on my doorstep yesterday, just in time for this weekend. Maybe I can get those installed as well.

Tuesday June 11th - 1.5hrs -  Back Riveted upper skin, riveted flap lower skin and leading edge
Wednesday June 12th -  0.75hrs - (My Wife's Bday!)  Finished riveting leading edge

Flaps Work

I deburred the flap skins and applied a small bend on the trailing eges of all the skins to help the edges lay flat after riveting. Deburring seemed to be taking forever so I recruited Jess to speed things up. After all was deburred and dimpled I clecoed the leading edges and skins on the skeloton frame and started riveting. So far so good and moving along nicely.

Sunday June 9th - 4.75hrs  All Flap Work
Monday June 10th - 1.25hrs  All Flap Work

Skins clecoed in place.

First line of rivets set.

Both Flap Upper Skins are complete, except the aft two rivets which are back-riveted.

The baby inspecting the work.

Finished Ailerons

A productive weekend leaves me feeling good again.
- Finished the ailerons
- Ran Conduit in the wings
- Finshed the Flap Gap Fairings
- Hung the wing skins in place
- Started the Flaps section

It felt good to finish up another section of the plans and to do it so quickly when compared to the tanks. The Flap Fairings have been patiently waiting to be completed for a while and I crossed those off the to-do list. Conduit needed to be ran and I finished that as well. I cut the little tabs off the 22(?) flap ribs, sanded and deburred them as well, while grilling outside. I hung the skins in place, placed the ribs back on the shelf, then cleaned the shop and put my tools away to be prepped and ready to start the next section after Memorial Day weekend.

Friday May 17 - 1.25hrs - Riveting Ailerons
Saturday May 18 - 4.25hrs
             2.0hrs - Riveting Ailerons, proseal trailing edges
             2.25hrs - Run Conduit
Sunday May 19 - 3.25hrs
             1.75hrs - Finished Ailerons
             0.75hrs - Finished Flap Gap Fairings
             0.75hrs - Cut Flap Ribs

Finished Ailerons Total Time = 25.5hrs

I was able to use the squeezer for all but the last rivet and instead of fighting to get a solid rivet installed there (and possibly bending the edge of the aileron) I just popped a blind in and moved on. I used an MK-319 rivet instead of the the AD3 rivet that is called out. The blind rivet is weaker than the solid, but in this case the material will fail long before either rivet would, so it doesn't matter.

I used an extension on the unibit to drill through the wing walk ribs. I then sanded the holes down with a dremel to clean up the hole.

I ran all the conduit through the wings. I just enlarged the standard hole that you create in the plans. Somewhere Van's aircraft has posted that enlarging this hole to 3/4" is acceptable to run their conduit through the wings. I still went with their conduit even though the corrugated edges make it difficult to pull through the holes and I've heard it's difficult to pull wires through, for three reasons:

1. It sretches, help during flexing of the wings.

2. It's made of Nylon which has a temperature range of -40 to 185 degrees F.

3. It's cheap.

 

 



A look at the finished ailerons.

Wing bottom skins hung in place.