Cessna G1000

[spoolinup22]

Not sure if this applies to other aircraft that use the G1000, but the transponder automatically turns to ALT once 30 knots of GS has been detected.

So if your doing slow flight and it's a windy day, could it revert to STBY? I would then assume once you recovered it would turn back on though...

 

[pwttogfk]

I've never seen the transponder go back to GND mode during slow flight. The AHRS, on the other hand, starts getting confused below 25 kts GS or so...

 

[CoffeeIcePapers]

Didn't know a Cessna 172 could fly at 30kts.

 

[spoolinup22]

Didn't know a Cessna 172 could fly at 30kts.

hah! not comfotably but it can

 

[Champcar]

Didn't know a Cessna 172 could fly at 30kts.

You can get the GS down to zero if the winds aloft are high enough.

 

[CoffeeIcePapers]

You can get the GS down to zero if the winds aloft are high enough.

Edit: g1000 fail.

Disregard.

 

[InlandFlyer]

I always thought the G1000 transponder automatically went to GND mode when the airplane was on the ground and the ALT when the airplane was airborne. Mind you, it's been many years since I've last flown one. That being said, I've also never actually seen the transponder switch to STBY or GND while doing slow flight.

 

[Blip16]

Try it and report back!

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[Blackhawk]

Any airplane can fly at 30 knots. Ground or indicated.

 

[Neil11]

Spoolinup is correct, transponder mode automatically changes with Airspeed. Although I have seen GS go to zero, I have never gotten as slow as 30kias. I imagine at that point the transponder would indeed switch back to ground mode.

 

[Autothrust Blue]

I always thought the G1000 transponder automatically went to GND mode when the airplane was on the ground and the ALT when the airplane was airborne. Mind you, it's been many years since I've last flown one. That being said, I've also never actually seen the transponder switch to STBY or GND while doing slow flight.

fixed gear, no squat switch

 

[flymike]

Dug this out from the CFI Forum, you can see transponder go to STBY when it gets slow.

 

[js0305]

A little slow to recover on that 2nd spin, letting the airspeed hit Vne.

 

[Blackhawk]

A little slow to recover on that 2nd spin, letting the airspeed hit Vne.

And recovered from it while banking- before leveling the wings. YIKES!

 

[KSCessnaDriver]

Boy am I glad I don't have a transponder that does this. I spent half the night doing 4 knots.

 

[spoolinup22]

yeaaah this has the potential to suuck. we do alot of slow flight, power off, power ons and what not. lucky for us we don't have radar until 3K and we hardly ever use it.

it also sucks with this system because anytime we go into an airport that has ground radar, once we land we have to turn it back on.

 

[SpiraMirabilis]

The other garmin transponders also do this...I forget which model number but they are the mode S models with the buttons instead of dials. Ours do the same thing and we just have 530Ws.

 

[Roger Roger]

yeaaah this has the potential to suuck. we do alot of slow flight, power off, power ons and what not. lucky for us we don't have radar until 3K and we hardly ever use it.

it also sucks with this system because anytime we go into an airport that has ground radar, once we land we have to turn it back on.

Yeah, it's just not an issue.

 

[jwp_145]

It's possible in that photo the XPNDR could've been manually placed into STBY... I've gotten a G1000 172 going backwards over the ground during dirty slowflight... the AHRS gave me a red X.
If you look in the G1000 Pilots Manual I'm positive it outlines the criteria for the xpndr automatically switching modes... I have the entire manual here at the house but it's late and is packed away in a box.

 

[Blip16]

The other garmin transponders also do this...I forget which model number but they are the mode S models with the buttons instead of dials. Ours do the same thing and we just have 530Ws.

330, we have them too

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