Beardy, thanks for your contribution!
I would admit that I am not 100% sure about the theory but I do know that angle of descent depends on the lift/drag ratio!
Perhaps some aerodynamics boffin out there could let us know!
I will go away and think about it but it probably depends on the exact numbers!
Essentially my point is that there is not much point getting back on the profile by increasing speed at the lower levels if you are going real fast at the bottom because you may then end up with an unstabilised approach which defeats the whole object of the exercise.
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