This topic came up at the Redhill safety evening yesterday. I don't have air-con, and I am VERY low time, I don't want to be in the same situation as the original post. So, my thinking (and question) goes like this:
Fogging is a function of relative humidity of the air inside the cabin and the temperature of surfaces in contact with that air. Avoiding condensation means I want the plexiglass temperature to be above the dew point.
So, on jumping in for start, is there a problem with applying full heat and fan, directed at the glass, as soon as the burner is properly lit? If that is added to the start procedure (and we learned last night that we can add to the start checklist) then by the time all checks are completed we should have one of two results. Either:
a) The fogging experienced by the original poster would have occurred, sit still and wait a couple of minutes for it to clear; or
b) If not, the plexiglas would be warmer than the dew point of the cabin air, now reduce (but not turn-off the heat unless you need the power) and keep a slight warm flow over the window.
1. Any problems with running the heater full whilst the remaining checks are carried out?
2. Would that be long enough to ensure adequate heat in the glass to avoid this problem?
Thanks
John