Rain Ice
R4H
The Redcoat Britannia out of Boston wasn't so lucky. They iced up at around 2000 ft on departure and didn't make it.
Nasty stuff clear ice or rain ice or whatever it's called this year.
Took 2 hours flying south into warmer air to regain a 20 knot IAS loss, due to clear ice, on a Hastings!
1066