We did some Aerotowing from Trøgstad on Saturday. Nice fall weather, clear skies but rather cold. Some very weak thermals over the hills. We got a late start as Alf forgot the key to the tug and had to drive back to Oslo to get it. My glider frosted over in the afternoon when the sun got low, and I did not want to fly without de-icing :-) (Also called “doing a Brønstad”)