8th May 2014


Worked on a couple of changes. One is as a result of decision to locate the headphone/microphone jacks on the instrument panel. In order to support my goal of easy removal of the pilot & copilot panels, I cut the ‘ears’ off of these panels so that the jacks remain part of the IP frame (since they are permanently installed).

I had a design some time back that reflected this, so will revert my design drawings(used for water jet) to reflect this:


The other change is the decision to switch from the GTX327 transponder to the Sandia STX165R remote transponder. So I listed the GTX327 for sale (it sold right away) and will be placing an order for the STX165R shortly. This will cause changes in the stack with space free’d up.


I wired up the RDAC-XF CAN bus to get it going. I only have a termination resistor at the RDAC for now as I want to add the SP6 & SP7 next.

The magnetic current sensor is temporarily installed on the battery cable which allows me to roughly monitor current to/from battery.



Right now it is showing discharge of about 1.7A and what my power supply was showing for the radio stack in receive only was approximately 1.44A but now there is the iEFIS added in, so current sensor is in the right ball park.



Went ahead and temporarily connected up the SP6 & SP7 to CAN bus 2, to get rid of the red Xs and to also test the connections.



Showing 213 magnetic right now. Need to think about that but lots of steel around the wiring fixture.


Hours: 7.0 | Posted in Avionics, Foward Fuselage | 0 Comments

7th May 2014

VAL NAV Radio Testing

I borrowed a VOR/LOC test set from a friend. It has some simple VOR tests as well as localizer tests and I just wanted to feel that the radio was working and I had connected it to the EFIS correctly.

Starting with both VOR and LOC off:


Then VOR on, radial 000 and set for ‘To’:


Then switched to ‘From’:


Checking other radials:







Then switched to localizer:










Cannot test glide slope yet, but everything else seems to be working.

Hours: 3.0 | Posted in Avionics, Foward Fuselage | 0 Comments

5th May 2014

More Wiring

I’ve done about as much as I can on the stack on the work bench, so I moved it over to the wiring jig.
The area above the radio stack is where the DVR will go and the area below the radio stack is where the NUC computer will be. To the right is the high brightness MFD monitor. There will be a black bezel surrounding the stack, matching the EFIS bezel.



Power is not yet connected into the VP-X but is still common on the main bus. I connected everything up and tested COM1 with a friend using 123.45. COM1 (VAL COM 2000) sounded good, maybe side tone is a little high but need serial port to adjust that.


Hours: 6.0 | Posted in Avionics, Foward Fuselage | 0 Comments

2nd May 2014

Minor Switch Changes & Work

I made a change to the Master switch mounting to make it different than the 10 VP-X switches and in a well protected area. It is now right above the magneto/starter switch and operates horizontally. I will also get a red cover for the toggle. This leaves the full 10 switches to the right for the 10 switch inputs to the VP-X


Then I went ahead and did the bus bar for the ground bus on these switches using 4-40 brass hardware. The nuts below are soldered in place to help if any switch needs to be replaced. They will have a common ground connection to the central ground point.





One other small change is the location of the headphones & microphones jacks. I was going to use the original positions behind the seats in the baggage area but then thought better of it. I moved the location to the instrument panel; but this is a small mistake on my part. I had wanted to be able to remove the side panels without the need to remove the jacks. Small problem for now but I had a IP frame design that would allow this.


So if I ever redo the IP I will make the frame change.


Hours: 5.0 | Posted in Avionics, Foward Fuselage | 0 Comments

30th April 2014

Serial interfaces Wiring

Started on the serial interfaces & cabling.




Hours: 4.0 | Posted in Avionics, Foward Fuselage | 0 Comments

29th April 2014

Stack Wiring

Finished with all the normal audio lines for 3 radios:

-COM1 (VAL COM 2000)

-COM2 (SL-40)

-NAV1 (VAL NAV 2000)

Wired up headset and microphone for Pilot position

Temporarily wired in a pilot PTT button so I could test the radios.

Transmit on COM1 with no speech puts the current draw at about 4.6A.



Hours: 3.0 | Posted in Avionics, Foward Fuselage | 0 Comments

28th April 2014

More Stack Wiring on the bench

Continued with wiring of local wires in the stack on the bench, testing as I go.


All 3 radios connected re: audio. Tested NAV reception on local ILS system and closest VOR. Looks good.


Currently drawing about 1.45A , receiving only.


Wasted one VP-X terminal in a crimp test after slight filing of crimper.

More stack wiring:

Wired power to transponder, just to see what the whole stack looks like in receive mode only.



Hours: 4.0 | Posted in Avionics, Foward Fuselage | 0 Comments

26th April 2014

Stack – Continued

I made up a short (6″) RG-400 pigtail for the SL-40 tray.


I replaced the outdoor VOR test antenna with a VHF COM test antenna.

Wired audio and power up to the VAL 2000 (COM1) & tested it. Sounds better than the SL-40.




Hours: 3.0 | Posted in Avionics, Foward Fuselage | 0 Comments

25th April 2014

Stack Wiring

Set up & started, sort of checking things as I go along. Easier to correct anything on the bench.


First power on audio panel.


Workbench setup.


First audio cable run.

And to close out the first day, wired pilot side headset jack and enough power in to hear first audio through the audio panel from COM2 (SL-40).

Hours: 5.0 | Posted in Avionics, Foward Fuselage | 0 Comments

23rd April 2014

New Stack – Test Fit


The rear support for the part that protrudes through the sub-panel will be integrated with the VPX/ADSB support brackets. Also a small fan for cooling air to transponder will be mounted here.


This image shows that area a little better.


Pilot side of the instrument panel.


I did pretty good at getting the faces aligned and plan to have a bezel that will match the monitor bezel.

This is the material I ordered to make bezels from. One side is textured, the other side smooth.



Hours: 6.0 | Posted in Avionics, Foward Fuselage | 0 Comments