It should position from Loch Lomond at the back of 9 for a departure around 10:00 to Oban. Leaves Oban again about 11:30 ish and back to Science Centre around noon or soon after. Departure again about 12:45 to 13:00then allow another 2 hours (and maybe a bit) for it to get there and back.

That would make sense as it passed me on the way in around 1500 or so on Saturday. It seems to be going well so far, looks like they want another plane already and more destinations…

http://news.bbc.co.uk/1/hi/scotland/glasgow_and_west/6977807.stm