Hi Patrick,
Thanks for the reply. Excuse my ignorance but are you saying that each airfield has a 'runway heading'? I thought the idea of a grassed field area was that they would allow takeoff in any direction depending on wind conditions. Presumably the ground crews would just position the aircraft accordingly prior to flight ops.
From what you've posted above it seems like each airfield has a hard coded takeoff heading? In which case I may just have to self position for an into wind takeoff.
I realise the prevailing wind would dictate the 'average' take off direction of east to west ie INTO a west to east airflow but I'm sure these old warbirds could be adversely affected by any sort of crosswind.
Having said all that it appears the devs have got the wind direction 180 degrees out anyway - see my wind speed/direction post down below. Just to complicate matters for you!

Anyway, thanks for your continued effort with this excellent utility, I hope our needs and wants all the time don't detract from your creative enjoyment.
Regards,
WB.