I like to fly the LOWI Approach, and I like to hold either at RTT or KTI, to have enough time to configure for next line of action. But I'm confused as to what would be the best speed for holding. Do I have to pay attention to the "best speed" which is usually around 224 +/-? It looks to me like the plane doesn't want to stick to the racetrack if I'm over 200. (190 at RTT). And I'm not talking about the entry, which I think it does pretty much well. Sometimes it starts turning a little too late after passing the vor, and when on the outbound track, it starts turning a little too early, and sometimes even ends up outside the inbound track (parallel). Someone please explain to me what I'm doing wrong.Thanks in advance

The magenta line is a prediction, not something that the AP will fly on rails. The AP itself and the magenta are two different things mathematically - the magenta is attempting to predict things while the AP LNAV mode responds to real time inputs and reacts to them - it's very difficult to get totally accurate predictions, especially when we don't have a whole computer dedicated to doing it. The real plane has entire computer systems dedicated to doing these predictions and nothing else. The real plane gets off the line too, we have pictures of it.

Besides: around your holding, you have a protected area of 5 nm. Don't worry too much.Bert Van Bulck

This might be of some help !http://forum.avsim.net/topic/347531-fmc-holding-tutorial/page__fromsearch__1Fred.

About the speeds, this is what Eurontrol publishes far CAT C/D/E ACFT

• up to 14 000 ft: 230 kt in normal conditions. 280 kt in turbulence
• between 14 000 and 20 000 ft: 240 kt (normal) and 280 or 0.8M, whichever is less (turbulence)
• between 20 000ft and 34 000ft: 265 kt (normal) and 280 or 0.8M, whichever is less (turbulence)
• above 34 000 ft 0.83M for all conditions.

Bert Van Bulck