Originally Posted by
Maverick SKC
Hi guys,
thanks a lot for your replies.
As I can see all the techniques run about the same:
ALT x 3 = NM to run (+ some NM for deceleration)
NM x 3 = ALT to be (minus some FT for deceleration)
Seems that both are working, with the difference between the 2 calculation getting smaller and smaller as we go closer to the ground.
I personally prefer to judge the distance to go and to get an altitude to be, because in the other way around as I feel slow sometimes, and I prefer to say “I’m 1500 ft high” rather than “I need 5 NM more”.
That’s personal of course.
To answer why I use LVL CHG to slow down I meant to say: I am in LVL CHG at 250 kts and I bug to UP speed, in this way the plane will reduce V/S to gain the speed.
on Airbus but the principle is similar. I don’t like much NM*3 at long distance because it’s a bit misleading as the rate is steeper than 3° with more than 250 knots. In this way you can arrive low. That’s why I prefer altitude*3 (or distance*3 + 10%).