Descent rates in a jet

[FracCapt]

Wow....all this complicated crap just to figure out how to make a crossing restriction? Half of the jurassic jets I fly don't do VNAV well(or we can't figure out how to make that specific FMS - one of 5 or 6 types in our aircraft - to do it exactly right). In those cases, altitude to lose times 3 works for me. Start down that many miles out. Add a few miles if you have to slow to 250.

 

[Mmmmmm Burritos]

I descend at whatever rate I feel like, GOSH.

Idiots!

 

[Lead Sled]

Wow....all this complicated crap just to figure out how to make a crossing restriction? Half of the jurassic jets I fly don't do VNAV well(or we can't figure out how to make that specific FMS - one of 5 or 6 types in our aircraft - to do it exactly right). In those cases, altitude to lose times 3 works for me. Start down that many miles out. Add a few miles if you have to slow to 250.

Hey, that's the way we did it in antique jets I used to fly. The only thing we did different was to use 6 times the groundspeed as the descent rate. You could nail any crossing restriction. However, I admit that coupled VNAVs are nice. (I guess that I'm getting lazy in my old age. )

'Sled

 

[421Driver]

That descent rate formula is awesome, it's INCREDIBLE!

Alt loss * 3 and add 10%. Then the GS/2*10. good rules!

 

[b82rez]

I descend at whatever rate I feel like, GOSH.

Yeah but you have to have skills. Girls only want boyfriends who have great skills

 

[Brett Hull]

Airplane skills, VNAV skills, ILS skills, Nunchuck skills....

 

[JetBlast2000]

That descent rate formula is awesome, it's INCREDIBLE!

Alt loss * 3 and add 10%. Then the GS/2*10. good rules!

Isn’t that more for TOD calcs to make a restriction or some point. What do you descend at when you get PD?

 

[Lead Sled]

Isn’t that more for TOD calcs to make a restriction or some point. What do you descend at when you get PD?

3 X altitude loss at 6 X GS works for discrete descents as well.

'Sled

 

[Duderino]

Gosh.