VNAV/VCALC?

[Skrimps 0]

Hello,

Just started using the GTN 750 and have a quick question. During flight w/ VNAV enabled I get some message about it not being supported for this leg of the flight. What does this mean? I did some research on it and found a few threads here about it but it looks like at some point it was changed from VCALC to VNAV. Is it possible to get VNAV working (really only would like ToD calculation) or can I revert back to VCALC?

[RXP 2,338]

Hi,

this is all detailed in the RXP GTN User's Manual, "Settings" chapter!

Hint: AFMS Settings.

[swuphoto 2]

On 7/16/2019 at 11:08 AM, RXP said:

Hi,

this is all detailed in the RXP GTN User's Manual, "Settings" chapter!

Hint: AFMS Settings.

Hi,

I also like to know enabling 750 VNAV for X-plane (Carenado Premier 1A), as I have trouble to find the section you mentioned above.  I didn't find AFMS keyword from the user manual:

http://reality-xp.com/support/trainingcenter/userguides/manuals/Reality%20XP%20GTN%20Touch%20XPlane.pdf

Search VNAV also returned nothing.

[swuphoto 2]

I found the VNAV settings in the user manual, Google search didn't return the latest version.  My settings under AFMS are:

  Vertical Navigation Type: VNAV
  Transition To Approach: Enabled
 

Still, passing TOD displayed on the map, the airplane doesn't begin to descend.

[scottb613 1,188]

7 hours ago, swuphoto said:

I found the VNAV settings in the user manual, Google search didn't return the latest version.  My settings under AFMS are:

  Vertical Navigation Type: VNAV
  Transition To Approach: Enabled
 

Still, passing TOD displayed on the map, the airplane doesn't begin to descend.

Hi...

I believe the VNAV/VCALC feature on the GTN is - advisory only - in nature - you have to command the AP or fly the descent...

Regards,
Scott 

[scottb613 1,188]

Hi...

Disregard - I see VCALC is new to the GTN software set...

Regards,
Scott

[RXP 2,338]

11 minutes ago, scottb613 said:

Disregard - I see VCALC is new to the GTN software set...

VNAV is a new feature since GTN 6.50, VCALC was the default and only available option before.

In both cases, there is no vertical coupling with the A/P at this time unless there is a Glide Path signal (VDI on the HSI)

[swuphoto 2]

 

 

 

 

13 hours ago, RXP said:

In both cases, there is no vertical coupling with the A/P at this time unless there is a Glide Path signal (VDI on the HSI)

Is this temporary limitation? I saw a video (by Rmag) on Youtube, the pilot explains how GTN 750's VNAV works if "VNAV that is enabled when paired a the G500 TXi/G600 TXi, G500/G600 or G5".

[RXP 2,338]

@swuphoto Hi, can you post the link to the video?

I believe this is limited to both having a Garmin EFIS, and a Garmin Autopilot (which gets its input from the EFIS, not from the GPS).

[swuphoto 2]

7 hours ago, RXP said:

@swuphoto Hi, can you post the link to the video?

@RXP

Hi,

In the video description he mentioned GTN 750 along isn't sufficient.  I wish to understand is that limitation only applies to real aircraft?  As in the sim, many aircrafts equip autopilot equipments (e.g. (Premier 1A/Pro line 21)