I know how to calculate my descent rate and when I should start descending, even though I do it correctly, I usually have to go around and start descending again. Is there another way to calculate your descent? Am I meant to be approaching the airport at a certain angle? Help would be appreciated. Thanks!

# Need help descending

Hello my friend, search before posting.

This one is very good by Thomas Hense

How to calculate rate of descent.

Method 1 - Ground speed x 5. 3 will give you your required rate of decent for a 3 degree glide slope.

Example: GS 300kts, 300 x 5.3 = 1590. Since VS adjusts in increments of 100, you should round off to VS -1600. It is better to come in early and level off than coming in high and having to dive bomb the airport.

Method 2 - Some people multiple Ground Speed by 6,

Example: GS 300 x 6 = -1800. Again better to come down early and level off to your next waypoint or to the start of the glide slope. Some multiply by 5, but I always seem to come in high using 5.

Method 3 - Divide your ground speed by 2 and add a zero.

Example - Ground speed 300kts Ă·2=150, add the zero for VS of - 1500

Method 4 - Start descent when the time to the airport equals altitude to lose for 1000 ft/min descent.

Example: 10,000 feet to lose, start descent 10 minutes out at 1000 ft/min.When you reach the ILS follow the ILS glide slope, using method one.

Method 1 is the most accurate, but you need to keep adjusting the VS as the ground speed decreases. Perfect for final approach.

Methods 2 is good for descending from 10,000 to 3,000.

Method 3 is very easy and gets you close to where you want to be.

Method 4 is useful when descending between waypoints when above 10,000 feet. I also use it between waypoints down to 3,000 feet above ground level.

All these methods require regular adjustments as your speed and time change.

Thanks for the reply. I know about this. I use the exact same method but sometimes end up missing the runway. That is what I need help on.

Check the post again :)

This one is the absolute easiest. You will always come in a bit early (because your speed decreases) and you will be required to level off or slow your descent. That is normal, you never want to come in to high. I use it every flight as well as between waypoints.

Of course you will be required to have a flight plan for any of the methods mentioned above. And in your instrument dock you will need â€śETA to Nextâ€ť and â€śETA to Destinationâ€ť if you are using time, and â€śDistance to Nextâ€ť and â€śDistance to Destinationâ€ť if you are using distance. I have all four including â€śBearing to Nextâ€ť in my instrument dock.

Use between a -3000 -2000 decent rate