182L Plan

[benapilot]

Hello all,

I am in the planning stages of installing a Skyview HDX system in my 182L (as well as a total rewire). I’m an A&P and will be working with an IA who has installed several HDX systems. He’s a busy guy, so I thought I would ask all my dumb questions here! I would like to be well prepared for the install before ordering any parts.
The plan is to start off with a single 10“ screen, get the ADSB IN module, EMS module, and interface with my existing GTR200 COM. An IFR navigator, ARINC module and possible autopilot will come later. The system looks like it’s somewhat plug and play and it -should- be easy to add those later. I fly 100% VFR here in Alaska so I’m not in a hurry to get IFR equipped.
I’ll keep my GTX335 ADSB out transponder.

My thought is to get the components, get a panel fabricated, and put as much as I can together on the bench before tearing into the plane.

A couple questions:

1. Does the HDX screen power need to be switched?
2. Will I need the magnetometer (I’m thinking yes). If so, mount it out in the wing tip? Or back in the empennage?
3. Dimmer control. Do most people let the HDX do the dimming, or tie it into a dimmer switch. I already have a couple solid state dimmer controllers for my panel lights and radio lights. Same for the D30, auto or wired?
4. I currently have a single master switch and the pesky auto-reset circuit breaker. I’m going to install a Plane Power voltage regulator and split master. The Plane Power can be connected to a light to indicate alternator inop. Can that be wired into the EMS to give me a red light in the engine pane?

I‘m sure I’ll have more questions as time goes on…. I’m thankful to have this resource!

 

[GKC Aviation]

The HDX power needs to come on with the aircraft master. If you install a second screen, you can put this on the avionics bus if you wish.
I have done a 182, and put both the screens on the battery master. The autopilot, transponder, radio's etc on the avionics bus.
You will need a magnetometer. I mounted mine in the RH wing just outboard of the fuel tank.
I made a bracket for it that mounts it to a rib just near an access panel. It works well out here.
I have always just used the photocell dimming of the screens and adjusted the levels to suit.
Yes, the alternator inop output from the voltage regulator can be connected to a general purpose input of the HDX. When I get some time I'll look up what you need. I'm pretty sure the inop output just puts a ground signal out when the alternator is not producing.
Most of your gear (EMS, backup battery, ADS-B, ARINC, etc) will mount to the 503039-000 avionics shelf tray that mounts to the forward side of the screen. Yes it all fits behind the panel, but you have to take a fair bit of care that you don't foul the yoke components. It's pretty close with a 10" screen.

 

[GKC Aviation]

 

[Rhino]

View attachment 6286

Nice!

 

[GKC Aviation]

Here's the magnetometer mount in the RH wing

 

[GKC Aviation]

For your alternator out warning, to simplify things I would just use the low amps and low volts warnings.

For a 12 volt aircraft, just set up your battery volts indication to give you a warning when volts fall below 12.5 volts.
Set your amp meter to warn you when amps fall below 0A
Both of these will indicate that your alternator is not on / failed by turning yellow or red, and giving you a flashing message.
These are easily configurable in the set up.

 

[benapilot]

Excellent!!

I like your magnetometer mount. I was thinking about it being in the wing tip, but was concerned about it being so close to my wingtip lights. Yours is a great solution!
Thank you for taking the time to answer all my questions!
Super helpful!

 

[benapilot]

Is there room in the radio stack for the COM panel, knob panel and AP panel side-by-side?

 

[Rhino]

Is there room in the radio stack for the COM panel, knob panel and AP panel side-by-side?

Based on his picture in post #3, there was room for that, and more.

 

[GKC Aviation]

You would get three side by side.

The Com, AP and Knob panels are 42mm wide. From memory, the radio rack usable width is about 160mm.

CAD and PDF files and drawings are available from the Dynon site:

Dynon Avionics | Drawings and CAD Models

Dynon Avionics' Templates, Drawings and CAD Modles to help you with your build

dynonavionics.com

 

[benapilot]

Today I went to a local avionics shop and played with their HDX demo unit and came away with a couple questions.

1. Is there a way to have the split screen on startup display the Engine page? I’d like to have a big round Oil Pressure dial to see on startup, then once verified, switch to Map or Full PFD. I wasn’t able to find any way to define what pages show on boot up.

2. CHT alarms. I went into the EMS setup menu and could see where the gauge markings are defined, but not where alarm values are set. Alarms only trigger in the red, correct?
My 182 CHT gauge is green (normal operating) 200-460° and redline at 460°. I have my non-primary JPI monitor set to alarm if CHT hits 400° so I have time to do something before things get fatally hot. Would I be able to do an Orange band between 400° and 460°?

Being able to manipulate the knobs and buttons and see things in action was super helpful and has me extra excited to get this installed!!