13th May 2014

VP-X Switches

Wired up all 10 VP-X input switches and started making assignments:

SW 1 – Alternator
SW 3 – Avionics
SW 4 – Fuel Pump
SW 5 – Strobe Lights
SW 6 – Nav. Lights
SW 7 – Landing Light
SW 8 – Taxi Light
SW 9 -
SW10 -AutoPilot Servos

I put the EFIS on a switch for now due to the way the original VP-X and the MGL EFIS must be interfaced & configured. :(

Hours: 3.0 | Posted in Avionics, Electrical | 0 Comments

9th May 2014

Updated SP6 & SP7

First thing I did this morning was to update my SP6 (compass) and SP7 (AHRS) to the latest firmware.



Hours: 1.0 | Posted in Avionics | 0 Comments

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