It's pretty simple to understand

So a idea of how long it can be would be like.
ASF-123-Z

[ASF] is type ASSULT SPECIAL FIGHTER

[123] is a design number

[Z] is model the the later in the alphabet the newer the model

Types I use are
(SF) SPECIAL FIGHTER
(CP)CHALLENGE PLANE
(HB) HEAVY BOMBER
(HVF) HIGH VELOSITY FIGHTER
(AS) ASSULT FIGHTER
and more.
I hope this comes to use for anyone new and gives other people ideas.