While visual I usualy prefer to use the FPV for better ffedback during an approach.In PMDG's 737NG with SU1.1 the kind of information provided by the FPV is not reliable, particularly when the aircraft is banked.Sometimes I am turning while maintaining my altitude (VS=0fpm) and the FPV stands way bellow the horizon, indicating that I am descending!!!If I rely solely the FPV, and completely forget about checking the VS scale I, most of the time, end up crashing!!!!Fix would be great for SU2!!!

HiThe thing you describe is funny because I'm using the FPV quite often for visual approaches and for flying the bird by hand and I've never experienced problems before. When the FPV points the horizon I'm flying level, even with 25 degrees bank angle.Does this happen quite often or only from time to time? What's the Aircraft weight when it happens? What configuration (gear, flaps, slats, speedbreaks) is set?I hope I can help you more when I have these informations...CheersMartin

I've seen the same thing, Jose, but I can't reproduce it at will (I just did some tests and only at large bank angles did it show any variation... and then it was on the safe side (the V/S showed a positive indication with the FPV on the horizon).My tests were done in still air, I didn't try it with any crosswinds. Perhaps this was the difference?Cheers.Ian.

Puali and Ian,I would gladly post a screenshot with the discrepancy between FPV and VS scale readings if I only knew how to post pictures here.I think I can use the ALT/PrtScr combination while "flying" fs9 to get a screenshot of the active window, but then it is saved in the clipboard, and I don't know how to place it in a message here...

well, convert the contents of your clipboard to an image file (paste the clipboard to an image processing program of your choice, and save it as an JPG file), and attach this file in your post (use "Click here to choose your attachments")HansJuergen

Thx Hans!!!Here it is, taken during a turn, flying manually. It lasted for more than 10 seconds!

I am a private pilot and I know that sometimes the VSI is not accurate at first. It does usually tell you the trend of descent or climb immidiately, but the numbers it is pointing at are not real for about 6-10 seconds. Is this your problem? Probably not, there are some VSI's that are accurate all the time and I would suspect that the airlines have them. The real question is, Is the altitude tape moving up or down? This would indicate weather you are in fact losing altitude or not. I would not suggest relying on the VSI.

Also note that the airspeed is climbing some what. Hope this helps. Wyatt Watkins

"there are some VSI's that are accurate all the time and I would suspect that the airlines have them."Correct. All modern Boeings have IVSI's (Instantaneous Vertical Speed Indicators). They use Inertial Reference Unit data to compute instantaneous vertical speed. However, for long term vertical speed, normal pitot-static data is used. The instrument will not function without both of these systems operating normally.Cheers.Ian.