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It looks like the Dynon GPS hasn’t locked onto the satellites yet. At least, that’s how mine looks when that happens. It has been happening alot lately after startup. Sometimes takes twenty minutes to get a solution.

Congrats on knocking that out

You will have to install a separate antenna for the Avidyne 440. The Dynon panel will allow you to select what your nav data source is inflight. I almost always use the 440 since it is IFR certified and I load my flight plan through that, either directly or using the iPad IFD100 app.

I would start by borrowing an optical ROM gauge so you have another source of data to check against what your system is saying. Use that to figure out how far off your RPM readings are and adjust the EMS from there. It took a fair amount of playing around with it to get mine to read...

To fly an ILS you will need a certified box that receives the ILS signal and talks to the HDX. There are lots of options, Garmin and Avidyne lead the pack, but most of those options also do GPS which adds cost. A Garmin 175 provides the ability to shoot GPS approaches and does meet the minimum...

A couple additional thoughts on redundancy, if you care to hear them. Buy at least 2 ADHRS units, even if you only have one HDX screen. That provides a redundant source of info to drive your PFD. I would also buy the backup battery for each HDX screen you install providing redundancy in...

Two different issues you asked about. If the Dynon screen loses power that means it either has no battery backup or that failed as well. In that case, I’m not sure the transponder or IFD would have power, so a non-issue for IFD control. If the screen merely failed the transponder should continue...

I’m having the exact same job done right now. Although, in my case the 5&6 sparkplugs decided not to fire this morning during an engine run. By negative, do you mean you are getting red Xs? Have you tried hooking up 5&6 to 3&4? Don’t know if your wiring harness is long enough to allow that. It...

Does anyone have the source document for what the standard height above settings are for when terrain should go from green to yellow to red? Clearly we can set whatever we want, but it would probably be wise to standardize it with the rest of the “world/FAA”. Thanks

I was thinking the TERPS stuff is just a paperwork exercise at a desk. Flight checking the procedure involves an FAA operated biz jet that I’m sure is very “efficiently” operated.

So any idea how much you would likely have to reimburse the FAA for a private procedure? Probably, to much for me, but I’m curious.

Once properly connected to your Nav radio (assuming it has ILS reception) the Dynon HDX will allow you to select the ILS as your nav source for the HSI and provide you with glideslope guidance. What NAV radio are you using?

I’m in the final stages of doing something similar in a Yak52. The only difference is using a IFD440 instead of the 430. You should be able to do everything you want to do. I’d recommend talking over the specifics with Dynon support folks. It’s relatively simple. Jesse Saint has done a bunch of...

Ed, Are you looking for a remotely controlled NAV radio like the VHF radio or are you simply asking if the HDX displays the relevant LOC/Glideslope info? If the former, you’re SOL, but assuming the latter the HDX has no need for an external OBS. All of that functionality is built in to the HDX...

I do have the backup batteries for both displays. The Russian electrical system reputedly can be hard on modern avionics during start. Thanks Dynon and RV8JD.

I’m almost complete with installing HDX in the front and rear cockpits of my Yak. I have the dual ADHRs and will have EGT/CHT for all nine cylinders which will be nice. Does anyone know of any gotchas I should be wary of prior to firing up the engine with all of the avionics installed for the...