turbosuper
Pre-takeoff checklist
- Joined
- Aug 3, 2021
- Messages
- 130
- Display Name
- turbosuper
After 25 years of flying with a Bendix/King KMD550, KLN94, KX165A, KDR610 XM, I upgraded to a Garmin GTN 750Xi, GPS 175, GI 275 MFD/CDI, GDL 69 XM. This was driven by the KLN94 not being a WAAS GPS, which means I could not even do an ILS at my local airport because it requires RNAV 1-GPS. There is not much choice in avionics and I suppose Garmin is the best choice, but I have lost features such as:
KMD550 displayed graphical METARs as two colored blocks, with the top block being sky condition and the bottom visibility.
KMD550 displayed the age of the METAR so at a glance you knew how old it was. The GTN shows age for PIREPs, but not METARs.
KMD550 had a banner on the bottom of the map screen showing current position i.e. "5NM NW of XYZ" no mental math needed converting radials.
KMD550 XM Nexrad radar seemed to be rendered better than on the GTN. On the GTN XM and ADS-B Nexrad both look blocky.
KLN94 allowed entering the altimeter pressure and setting an altitude so that you got an audible warning 1,000' prior to and at set altitude. To get this feature back I would need to purchase a GI 275 attitude indicator.
KMD550 had a much better layout for navigating METARs and TAFs, one button press brought up the METAR page with your destination METAR and a list of about 10 other nearby airports across the top of the screen. You could view them by just using the joystick and scrolling left or right. You could also change to airports along your route or nearest you. On the GTN I need to open the waypoint screen, enter an airport ID and then select to view the weather. This same process must be redone to select another airport to veiw weather. If I want to see nearby airport weather at my destination I need to scroll there on the map and touch the airport I want to see, bring up the weather with a few presses and repeat for other airports. The KMD550 was the clear winner for easy viewing of weather.
Garmin could add these features with a software upgrade, which would bring back my 25 year old funtionality.
KMD550 displayed graphical METARs as two colored blocks, with the top block being sky condition and the bottom visibility.
KMD550 displayed the age of the METAR so at a glance you knew how old it was. The GTN shows age for PIREPs, but not METARs.
KMD550 had a banner on the bottom of the map screen showing current position i.e. "5NM NW of XYZ" no mental math needed converting radials.
KMD550 XM Nexrad radar seemed to be rendered better than on the GTN. On the GTN XM and ADS-B Nexrad both look blocky.
KLN94 allowed entering the altimeter pressure and setting an altitude so that you got an audible warning 1,000' prior to and at set altitude. To get this feature back I would need to purchase a GI 275 attitude indicator.
KMD550 had a much better layout for navigating METARs and TAFs, one button press brought up the METAR page with your destination METAR and a list of about 10 other nearby airports across the top of the screen. You could view them by just using the joystick and scrolling left or right. You could also change to airports along your route or nearest you. On the GTN I need to open the waypoint screen, enter an airport ID and then select to view the weather. This same process must be redone to select another airport to veiw weather. If I want to see nearby airport weather at my destination I need to scroll there on the map and touch the airport I want to see, bring up the weather with a few presses and repeat for other airports. The KMD550 was the clear winner for easy viewing of weather.
Garmin could add these features with a software upgrade, which would bring back my 25 year old funtionality.

Yeah, that sounds about right. It's like they actively hate customers, though a $19K PDF is another level worse than my $9600 used trim servo.




