Hi Nick,
Whilst I realise my question posed is like
"How long is a piece of string" and must have infinate explanations and diagrams along with calculations to explain it to its absolute end, thank you for giving the short answer that I must admit I understand what you write. Is the other effect the " Coander" or somthing like that, however it is things like this that set the old grey matter racing, whether for cover or open ground I'm not sure but it is deeply thought provoking.
Thank you Nick
