Category: Pitot

Connecting Wing Wiring

April 27, 2021 – Now that the wings are on I can connect the wing wiring.

I safetied the tank attach bolts. Not sure why they need to be safetied, since they go into a nutplate that locks, but OK… I drilled the safety wire hole in the steel bracket.

I also installed the fuel lines.

I ran the pitot and AOA tubes into the fuselage and back to the ADAHRS, then connected the heat controller. Put power on the airplane and the heat works. I don’t have a message saying the heta is either on or off yet; I’ll set that up later in Dynon.

I ran and terminated the wires for the roll autopilot servo. The Skyview network portion is connected to the hub in the back.

I plan on connecting the wires for the lighting and the stick grips on a terminal bar under the left seat.

When I tried my lights, I had crossed the wires for the right landing light and the right nav lights. Got that figured out and now the lighting works correctly.

Time: 25:00

No Smoke!!!

February 3, 2021 – Well, I fired up (poor choice of words) the panel using my power supply. No pops, sizzles, smoke or fire.

It also was pretty underwhelming, because only the left screen turned on. I tried the dimmer for a lit rocker switch, and it worked. The glareshield fans also worked. So I call it a win. I know there are several things to do to get everything up and running.

I needed to get into the VPX and get it set up. The interface external to the VPX is ethernet. Well, my laptop has no ethernet port, so I used an alternate method suggested by Vertical Power. I used a wireless router.

Once that was complete, I looked over at the panel and saw this:

The right screen came up!

I downloaded the latest software from Dynon (as of January 27) and installed it on both screens.

I then went in to system setup and set up the serial ports and scanned for devices on the Skyview Network.

The issue I then had was that the screens weren’t talking to each other. You can “daisy-chain” the devices on the network, which I had. But it seemed evident that maybe I needed to directly connect the screens to each other. So I ordered a 3-foot Skyview Network cable. When I got it, I rearranged the cables between devices. It worked!

I decided to prepare the wings for installation, so I could get ALL the wiring connected and do all the panel setup maybe at one time.

Pitot Tube and Heater

I started on the pitot tube. I was given a brand-new Dynon heated tube. I had seen online where people mounted the heat controller to the wing access panel.

I took the tube out and realized I didn’t have any of the AN hardware I needed to connect the tube to the pitot and AOA lines. I visited a local avionics shop and got most of what I needed from there. In the meantime, I drilled the holes to attach the tube into the mast. I already had holes in the mast from a long time ago, so I transferred these hole locations to the new tube. Drilled with a #36 bit and tapped for a #6 screw.

I made a bracket to support the plastic pitot and AOA lines and keep them away from the aileron bellcrank.

I’m on hold for the parts I’m still missing, so I moved on to the autopilot roll servo in the right wing.

Autopilot Roll Servo

Here’s the right wing aileron bellcrank without the servo:

The servo bracket replaces the small mounting angle there in the center of the picture. You have to take the bellcrank partly apart, because it has to be drilled. This is where the servo control rod attaches.

I installed the new bracket, and then bolted the servo in place.

The control rod is supposed to be 5 inches long.

Here’s everything installed.

Now it’s time for wiring. I installed the DB9 connectors on the servo and the harness, then ran the harness through to the wing root. I had to do this twice because I had to avoid contact with the aileron bellcrank travel.

For right now, I secured the connection using the threaded bolt holes in the servo itself. This will place the connection on the aft side of the servo when it is on the airplane. The harness runs between the arms of the bellcrank and out through the wing ribs.

Time: 11:45

Continued installation of left lower skins

January 20, 2012 – We continued to install the lower outboard skin on the left wing. The flap brace is completely installed, and I installed the hinge pins. They were a pain with the wing in the cradle, but I know they’ll be easier when the wing is horizontal and low to the ground.

We also got the pitot mast installed. I sealed it in place, as well.

We should have the left skins installed in just one more session, then we get to do it all over again.

Time: 4:40

Installed pitot plumbing

November 24, 2011 – I got the fittings that I needed to make the plumbing for the pitot tube in the left wing. I am using the SafeAir tubing kit, but I had to get from the connection on the pitot tube to the plastic tubing in the kit. I bent tubing to go from the pitot down through the hole in the rib. I had seen this configuration on someone else’s site, and I liked it.

After I had it cut to fit and flared, I placed the tubing in the wing before I flared the other end. It was a little bit of a tight fit to do the other end, but not really a problem.

Here’s the fitting that came with the SafeAir kit that transitions from rigid tubing to the plastic. The plastic tubing will fit into this connector and go on to the inboard ribs and out into the fuselage.

Time: :30

Pitot mast drilled

November 21, 2011 – I have drilled the pitot mast and started working on the plumbing in the left wing for the pitot tube.

I started out by marking lines that extend from the drilled holes in the tube out past where the mast will be. Then I put the tube in the mast and extended the lines onto the mast.

I drilled the holes and took them up to size, then checked the fit of the screws. These screws came with the pitot tube. I may replace them with stainless countersunk screws.

Time 1:35