I've found, like some others have said here, that the best way to control the speed is to use the FMC and Speed Break (set not armed) and if you need flaps then 1 or 2. Generally the plane will use decals to slow down upon decent if you program your flight into the FMC correctly.

If you look up chapter 4.21 FCTM of 737 you'll notice the rate of descent is about 1700fpm in clean conf. with IAS250, and i have been informed about that by Ryanair pilot as well.

I hope there will be a patch that solves this.

 

I have talked to Ryan Mariarz about that. He tells that this table was written using average performance of the 737NGs.

More accurate figures are in full version of QRH.

 

I have retelled our conversation with Ryan to two real-pilots. That encouraged one to make video of flight instruments during descend (this video is unlisted on youtube, and i don't know can i be allowed to give you link). I have compared it with NGX. Everything is very close to real, except N1 - on NGX it's about 3-4% higher than on real one.

So I think flight model was implemented correctly.

 

Jack Colwil, real-pilot, beta tester of NGX, has made two videos showing how to use SPD INTV to descend faster. But i can't find that video.

 

My second pilot friend works in Ryanair too, so he understands the importance of CDA and LDA. He said, that NGX T/D is about 10-15nm earlier. He agrees that NGX is a little bit too inertial.

And he made vidoe with some tricks. Yes, I know it's in russian, but i think you can understand it without explanation or you can ask me.

 

[media=]http://www.youtube.com/watch?feature=player_embedded&v=S-SL8jAP8Y0[/media]