Hi all,

I have watched the new IF tutorial’s video about descent and also the Captain Joe’s one and I’m still doubting about which one of these videos are the more accurate to the real life.

To simplify, Captain Joe says that the TOD should factor winds (1NM per 10kts wind), the altitude to lose (current FL divided by 3) and speed reduction (1NM per 10kts IAS) by the way, he says the average descent speed should be 200kts IAS and for the descent rate, it’s: Current altitude (in feet) divided by the time of the descent (TOD / 200kts) but it’s not steep enough. So, here’s his descent profile.

However, in IF tutorial’s video, the formula is different, for the TOD, it’s altitude to lose / 1000 x 3 and for the descent rate, it’s GS x 5. In this case, the descent rate doesn’t change (except if you change your speed).

So, which one is the most realistic?

Thank you for answering me.