On some aircraft lists, including Eurocontrol's Aircraft Performance Database, aircraft have a 3 character code as their type. For example, an Airbus A320neo has a type of "L2J", a Boeing 747-400 has a type of "L4J" and a Cessna 152 has a type of "L1P".
I'm guessing the 2nd character is the number of engines (although some aircraft have a C for the 2nd character, and I'm not sure what that means), and the 3rd character is the type of engine (e.g. P for Piston, J for jet and T for turbine).
I'm not sure what the first character represents.
There are 6 options for the first character: L, S, A, H, G and T.
Does anyone know how these codes work?