User blog comment:SlyCooperFan1/Ace Combat 7 - Kono's E3 Interviews/@comment-25045164-20170621055035

A new video is up and it has some details about icing mechanics.

1. Once the process starts, your plane will warn you with [ICING UP] text in the same vein as [PULL UP] and [STALLING].

2. Water droplets on your canopy will freeze until visibility is completely butchered.

3. A bit debatable in the game's case but you'll lose speed to a point of stalling, which makes sense in real life.