Nav tutorial request: 3D nav

[Stretch]

The manual gives an example of a use for 3D nav: In an IFR landing with no ILS, you can set a precision waypoint to the end of the runway, and use 3D navigation to get your glideslope bars to indicate a GPS-guided approach to the runway at a 3.5° glideslope.

 

My question is ... how is this done? The manual talks about how to use the 3D nav features of the EGI but never gives a step-by-step. My guess is: 1) create a waypoint at 0 AGL over the runway; 2) create a waypoint some distance back at an altitude corresponding to a 3.5° GS; 3) set the WP attributes of the touchdown waypoint to be 3D nav and approach precision. Is that all there is to it?

[Frederf]

This is a good grouping of info about the CDU and using various navigation types. http://forums.eagle.ru/showthread.php?t=63874

 

The process would be something like:

1. Make/have a waypoint on the glide path for that runway's approach (50' above the threshold or 1000' down the runway on its surface).

2. Change scale to approach

3. VNAV to 3D, entered -3.5 value

4. Use TO-FROM navigation

5. Align CRS knob with runway heading

 

Then one would fly the VNAV needle and the CDI as one would do ILS. The ADI yellow bars are commanded pitch and bank, not horizontal and vertical position. Pitch works fine but the bank bar is misaligned (bug) by the value of local declination so it and the HSI can't be correct at the same time.

[jazjar]

Do you set the VNAV from the NAV/ATTRIBUTES pag or the steerpoint/waypoint page?