Hey mac thanks for the info makes sense now wasnt aware of all the twin stuff cross starts etc etc and the oil pressure thing came outa the garret part of my brain...i think....
the green arc on the airtractor -15 starts arond 10 c i think cant remember the 65 ag but it was similar i seem to remember but one further thing at the risk of being podantic i have never seen a pt6 pick anything up in feather and have been on a lot of dirt strips have seen dash 8 started at tanami same thing in feather doesnt pick anything up but as the prop comes out of feather into fine ....well thats a different story stones everywhere so ozexpat cant understand your theory????....