Hi, I followed iniBuilds tutorial on how to correctly start the descent from TOD but the airplane always arrives near the airport too high. In the video the guy sets the target altitude and then presses PROFILE button near TOD in order to activate P.DES mode. I tried it, it doesn’t work. Another p…

Allowing the A310 to automatically follow the descent profile does seem to result in being too high for the approach. Two changes I make to help are: Change the flight plan height constraint for IAF or the waypoint at platform altitude from “At or above” to “At”. Using spoilers to assist with…

Read your linked post. Indeed it sounds like the Bus is “activating” the approach which will slow it to its “characteristic” speed; green dot if flaps are up, etc. I don’t know how or why the MSFS box does this. In the 320, there is a point depicted on the ND that shows where the FMS will activate…

Using cost index of 25, like a simmer suggested, I correctly landed. Before I’ve used 40

Hmmmm, odd. That shouldn’t alter your descent speed, certainly not that much. But, you know the old saying: “If it’s stupid, but it works…it’s not stupid.” Well, glad it works as advertised! :smile: :+1:

Here the correlation, page 51: airbus-cost-index.pdf

the steeper the descent path (the higher the speed) [image]

Interesting, and logical. In our company we use cost index for climb and cruise, but a fixed 290kts for descent (or as assigned/depicted), so we don’t really face this issue. I didn’t read the whole source document, but I’m surprised that the TOD calculation doesn’t take this into account. In addi…

It would be interested to know how real A310 counterpart works, maybe the CI is changed before TOD in order to have a better descend, who knows! Is it possibile to find original A310 procedures?

Having tried various CI for descents I haven’t noticed any change in the aircraft’s ability to follow the descent. Changing the earliest approach platform altitude constraint to a hard “At” constraint has the biggest benefit. This makes sense as the A310 obeys the “At or above” but that often leads …

That is an excellent suggestion and something we sometimes do as well to reduce the “latitude” that the FMS has to choose the descent profile. Some arrivals are notorious for getting you high. I noticed earlier that those altitudes on the arrival are all at or above. So the aircraft is perfectly ha…

How can I change it to “At”?

A310 doesn't follow descent profile (ignored bug?)

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ionic81 April 3, 2023, 10:54am 21

Thanks, I’ll do a test with CI 40 and this option in order to see if I can land on LIRP

Airbus planes autopilot issue's