Ignition Breaker wire isolater

I ended up putting 3 mechanical breakers on the co-pilots side console for the ignition coil packs and two ignitions. These circuits are fed from an essential bus sourced by either the aux or main contactors in the rear of the aircraft. Both of the buses are connected to a schottky diode which means that if there is ANY power in the system, it will feed the essential buss.

I opted to not put any of these flight critical items on the VPX. I also opted to keep them out of the AUX fuse block because I wanted them to be in-flight resettable. On my first installation of this setup, I was uncomfortable that now my safety came down to a single yellow ring terminal and a dangling wire. There was no real great way to isolate movement of that cable. After a couple of goes at various circular connectors and adel clamps I came up with the following design:



In this approach I removed all connectors and wired everything direct to the breakers, but isolated movement of the cable with a standoff that I could solidly mount to adel clamps to. Out of the design and into metal it goes.




Probably a little overkill, but why not when you have the tools, the software, and some spare time on the plane for work.


I suppose I have to grab another photo yet of the final install, but here it is for now.

FlyEfii Coil Bracket

If you remember when I got my System32, I struggled with how to mount the 3 coils forward of the firewall. A lot of people had just been using Adel clamps to secure the coil pack to the engine mount. The coils are surprisingly heavy though, and I think far too heavy for adel clamps. At the time, I had found some great bar mounts that I had milled and modified to fit my application. I was really happy with that however when I went to go install the cowl top, they coil pack was sitting too high and touching the cowl top.

With that, my new coil pack design had three goals. 1) securely mount the coil pack to the top bar of the engine mount with ubolts. 2) If possible, get some vibration dampening in the mount 3) Keep the coil packs as low as possible so they did not touch the show planes cowl.

To accomplish these goals, I ended up with a plate that allowed the coil pack to pass through the plate allowing me to put the coil pack at a minimum distance above the actual bar.

I drew this up in Fusion 360.


Then put it on my router table in the basement.



I did cheat and mill this out of plywood twice because I didn't want to destroy the $100 chunk of aluminum. The final product though is shown below.

I secure this to the top bar of the engine mount with three cushioned stainless u-bolts from mcmaster.

I could not get the fourth one because of the intersection of two bars right where I wanted to put a u-bolt.


The final product however was perfect. The coil packs are secured to the plate with 3 AN-4 16 bolts and 3 washers standing them off of the bar by 1/8".