What is (2e) and (4e) in medium and heavy aircraft models?

[mahaniok]

I see Medium Aircraft (1e) and Medium Aircraft (2e), no explanation anywhere.

[mahaniok]

And what is the point of (2e) medium aircraft at all?

[MavenCole]

It is the number of engines for the air frame of the aircraft type
1e = 1 Engine
2e = 2 Engines
4e = 4 Engines

Think F16 (1e) vs F15 (2e) vs C-130 Hercules (4e)

[KarisFraMauro]

So that's what it means... Probably better if they just say engines in the first place.