OK, but the reason you gave for poo-pooing the idea of 30 mins was 490 G/S not going to happen (at least thats the way i read it).
Sure, 30 mins is ambitious, but not because of the groundspeed (as you are obviously aware). I reckon if it was teed-up (AY dct 5 mile final, no speed etc), 30 mins wheels up to wheels down could be done! Sounds like a challenge! Any takers?
Capt wally- AY- SY is going to be favourable most days- yes? Watched a jungle jet grounding at 550 yesterday (with the wind), and the wind was nothing special.
I'll still fly Rex- the staff are great.