GNX-375 and ForeFlight

[rbp]

1 hour ago, Dialed In said:

avionics shop said the 375 is sub meter accuracy

Look at the satellite page on the 375. That should give you the accuracy on the device itself.  

from the 375 specs: LAT/LON position accuracy: <1.25 meter RMS horizontal, < 2 meter vertical, with WAAS

[Ragsf15e]

4 hours ago, ijs12fly said:

Yeah, me too,  i was dancing on the tops of a Solid overcast IMC layer.  When the Alternator failed, the red Voltage warning light was not noticeable given it was a bright sunny day above the overcast.  I never saw it.  Harrisburg called me with an amendment to my flight plan.  I looked down at GPS to see where I was vs next way point and just then the GPS shut off,  hmm, thats weird ,  so then I went to Ack the ATC call and radio had only Static while transmitting.  At that point i noticed the Volt warning, and the Amp meter in discharge.  After alternator fails all avionics pull a pretty big drain on battery until you hit a threshold that things begin to fail.  My old GPS (Appolo) shut down first in the high 10V range, radios could receive but not transmit at that same time.  I squawked 7600 and ATC said they saw lost comms from me,  so I then started to shut everything down (hoping  to save some for the Elec gear).  I knew the weather was calm -  a 2000' layer, so I wasn't worried, except for other aircraft.   I did have my Clarity Box and WingXPro,  so I was able to navigate and watch for traffic.  I saw a hole in the overcast,  squawked 1200,  spiraled down thru it and then shut Master Power Off.   Then flew VFR below the layer and made it down safely.  

Back then my iPad only connected to my external Clarity ADSB box.  So there was no downtime with a feed to the iPad.  I was in an stress free spot VFR on top when my emergency happened, and it was great to have an iPad with GPS that didn't need to be reconfigured when i was trying to manage an emergency while hand flying.  I don't want to lose this capability. 

This is why I started my discussion above, to be ready if this day happens.   I plan to spend the extra $100 on an ipad with GPS, just so I can keep Foreflight running, I have to ASSUME that if the GNX-375 stops sending GPS, then Foreflight will default to the internal GPS of the iPad?   I don't need cellular as I have hotspot, but having GPS makes sense for my use case.  I will probably just keep my Clarity box charged, and if I ever need it,  can sync it to the free FltPlan.go app that has a 6 pack view and the AI works with Clarity AHRS.

I also have a G5 DG/HSI going in,  I have heard some shops disable access to the AI screen.  Anyone have first hand experience with the G5 and flipping from HSI to AI?

 

 

 

As long as you bought the G5 with adhrs and backup battery and it’s enabled, it’s pretty simple to flip to an adi page.  Button push, turn, push.  It’s better if you have dual G5s because it will auto switch if the primary fails.

[rbp]

On 6/11/2022 at 5:29 PM, Ragsf15e said:

As long as you bought the G5 with adhrs and backup battery and it’s enabled, it’s pretty simple to flip to an adi page.  Button push, turn, push.  It’s better if you have dual G5s because it will auto switch if the primary fails.

the STC for the G5 acting as a standby instrument says that it has to have the HSI page disabled, so it can only show the AI

[Will.iam]

I have an ipad with internal gps. My ipad connects to the garmin 345 and uses the garmin 530w gps as i lost ads-b for foreflight. When i turned off my garmin 530w in flight on day but still kept my position via the inter gps of the ipad. I also like getting weather updates without tethering my ipad and i also like using find my ipad to locate it since the ipad doesn’t need to be connected to a wifi connection to report where it is and if it’s moving you know someone has it. 

[Ragsf15e]

2 hours ago, rbp said:

the STC for the G5 acting as a standby instrument says that it has to have the HSI page disabled, so it can only show the AI

Yeah, but I think he said he was having one installed as an HSI, not as a required backup adi, so it’ll be primarily up as an hsi, but he should be able to select pfd from the menu.

 

[ijs12fly]

Correct,  Still have Vacuum AI, and new G5 DG/HSI,  so glad to hear I will be able to use the DG as a backup AI if I ever had a vacuum failure in IMC.