Originally Posted by Ice-Bore
The glycol present in the anti-icing fluid will effectively melt the snow falling on it and the fluid will become progressively more and more diluted as time passes. Eventually the glycol will be diluted to a level where it becomes totally ineffective and the snow will start to form or accumulate on the treated surfaces. At this time the so called 'Holdover Time' will have run out and the aircraft will require a further de-icing/anti-icing treatment.
Are you claiming that when an aircraft takes off during snow showers and within the allowed hold-over time, thanks to the magical effect of glycol, the snow instantly turns into water and the wings just look wet, as though it was just raining? There is no presence of slush, partially melted snow, snow crystals, nothing that has consistence?
In fact there is, and that is why the Regs, here anyway, still allow take-off as long as none of that stuff
adheres to the surfaces.......