AirRabbit
Your right, I think Boeing call it a Flight Path Vector (FPV), Velocity Vector came from my whizz jet days. As you say if you hold the FPV on 3 degree down you will follow a 3 degree glide irrespective of speed its just that to do that you will have to alter the nose attitude as the speed alters. Thats one reason its so usefull on non precision approach's. I was just using constant speed to simplify things.
Sadly no HUD, though the FPV is displayed head down on the PFD if you select it on the EFIS control. Otherwise its just the datum locked to the aircrafts nose position relative to the horizon. Shame as I'd love to have a HUD.
As I said last post at least I understand better were your coming from. Although I think its too complicated for normal training (I see no reason to express the basic technique differently from the FCTM) remedial flying is a different thing and then it may indeed become worthwhile trying a few different things in order to unlock the key and help the student progress. Always assuming you've tried the obvious fix's first. Provided your still teaching the same technique, albeit expressed differently, there is no reason not to if it might help someone. In fact its your job as an instructor to do just that.
I might even try it in the sim one day for a giggle but I wouldn't hold your breath
Anyway I'll bow out for now, I'm glad we seem to have reached some kind of mutual understanding if not agreement and the discussion has made me think which can only be good. Sadly in the UK days full of sun and calm winds are rather rare but I appreciate the sentiment.
Good luck to you, if you put in the same effort with your students as you have done with your posts I am sure they will appreciate and benefit from your instruction.
P.S. No ground effect at Malaga today, thankfully a burst of power sorted things nicely. Guess I lack finesse.