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Factoring for delay in turn LNAV

Hello folks! I am trying to get a turn anticipation distance worked out in order for the LNAV to hit the next segment right in line.

I have utilised the radius calculations etc, however given the speed and turn angle I either overshoot or understood the turn. I believe the problem stems from the fact that the aircraft takes anywhere between 8 to 12 seconds to fully establish in the bank given the speed and this causes a reduction in the overall bank angle factored by the end of the turn.

Would there be a formula or conditional statement that I could use in order to account for this delay or a better implementation to get LNAV to make all turns precisely?

Thank you all in advance.