Hi there,
what do you think about introducing the possibility of having planes be automatically damaged when they're exceeding a certain speed? That would be a realistic thing to happen, don't you think.
Give every plane its own speed limit setting, check every n ticks if its faster than that and then damage it by maybe 1/10 of its max health every second?

Tell me what you think and if you wanna write the code yourself. Otherwise I can do that too and give it to you so you can implement it.

I thought about adding a speed limit before, however I do not think it would be used by most users. Personally, I think I would be annoyed if my plane kept taking damage when I try to fly fast.
Maybe others have different opinions, thanks for the suggestion, I'll think about it.

Added in 1.5.7
The speed can be capped, but the plane takes no damage.