THose three in my sig are the three forms of Getter Robo. The three jets can combine differently to make one of the three robots. Each have different traits to get the job done.
The red one, Getter One, is the only one of the three that can fly. It also has the most and powerful attacks, it seems. Piloted by Ryo, the leader of the three.
the white one, Getter Two, has a huge hunking drill for an arm. It's used to chase Mechosaurs (the enemy) underground if need be, and also place large holes in them
It's the fastest of the three, being able to go so fast it looks like there are mulitples of him, confusing enemies. Piloted by Hayato, one crazy mother...
The last and third one, Getter Three (original names, no?) is kind of like Guntank, if you are familiar with the original Mobile Suit Gundam. It's basically the upper half is humanoid, the bottom half is tank treads. This one is the strongest of all the Getter, using it's massive stregnth tho throw enemies. It's also best suited for underwater battles. Piloted by Musashi, a big hulking man.