Emergency glide feature.

[jaba-who]

Tried this feature out today and immediately ran into a problem of the autopilot selecting wrong airport and I can’t work out ( nor can I find any instructions) on telling it to drop the selected airport and go to the next nearest.

I’m in a wheeled fixed wing and the emergency glide keeps trying to fly me to the nearest airport in the database which is which is a float plane base.

The next ( ground based) airport is still within glide so it should be able to take me there but won’t allow me to override the water landing.

How do I override it?

 

[Malndi]

Have you configured the NRST filter and selected it to ON?

 

[jaba-who]

Have to admit - no. Had a look at the manual about the glide feature and it doesn’t say anything about filtering in that section. Maybe there’s filter in the NRST section. But that’s defeats the purpose of the feature if you have to have complex other, never used, parameters set up prior to use.

But that’s not the point - I want to be able to select regardless of the existing filter.
There’s a whole bunch of reasons, all things being equal I might want to not go to the nearest airport.

Such as - ones my home airport, one has better emergency facilities, familiarity with one etc
Seems it needs capacity to be usable if as you suggest the filter may not be set up.

 

[Malndi]

I get what you say about choosing a runway, but the feature seems to be designed to minimise workload in an emergency. If you have the bandwidth to be looking for runways you may not need to use emergency glide.

Have another look at the Emergency Glide section of the manual pages 8-2 to 8-8, it does indeed say NRST filter needs to be configured for emergency glide to work, same with Vg and sink rate.

Also to quote the manual “Once the NEAREST window is displayed, the FILTER button can be used to filter out airports that are less useful to you (based on length, surface type, and usage).”

 

[airguy]

As Malndi says - the tool is really intended for those mental overload situations where the pilot is doing good just to keep breathing. If you've got enough brain processing power working in spite of the adrenaline of a true emergency, then you're capable of kicking off the autopilot and hand flying to a destination of choice.

 

[jaba-who]

Yep. Fair enough statement.

 

[jaba-who]

I get what you say about choosing a runway, but the feature seems to be designed to minimise workload in an emergency. If you have the bandwidth to be looking for runways you may not need to use emergency glide.

Have another look at the Emergency Glide section of the manual pages 8-2 to 8-8, it does indeed say NRST filter needs to be configured for emergency glide to work, same with Vg and sink rate.

Also to quote the manual “Once the NEAREST window is displayed, the FILTER button can be used to filter out airports that are less useful to you (based on length, surface type, and usage).”

My glide speed, sink rate etc is/was configured. Just not the NRST related filter.

 

[Malndi]

My glide speed, sink rate etc is/was configured. Just not the NRST related filter.

Hope that takes care of the water landings problem