There is definitely a lot of ways to calculate and plan your descent and I have been playing for over a year and I just found the method that I find the most efficient for me and you just need some simple calculations
What you will need:
- Your current altitude (MSL)
- The elevation at your destination
- Your groundspeed
Calculations:
FOR YOUR TOD (top of descent)
- Take your altitude (ex: 33000ft)
- Subtract your altitude by your destination airport elevation (ex: 33000 - 1269 = 31731)
- Subtract this number by 3000 (ex: 31731 - 3000 = 28731)
- Divide this number by 100 (ex: 28731 / 100 = about 287)
- Divide this number by 3 (ex: 287 / 3 = about 96
So your TOD will be 96nm from the airport
FOR YOUR VS (vertical speed)
- Take your groundspeed and multiply it by -5 (ex: 427 x -5 = -2135)
So your VS will be -2200fpm