The Dodai YS was a mobile suit sub-flight system mass produced by the Principality of Zeon. It could also function as a bomber.
The Principality of Zeon designed the Dodai YS as a mobile suit sub-flight system to give its mobile suits flight capability within atmosphere.
The Dodai YS was succeeded by the improved Dodai II. Even after that, the aircraft remained in used and several units were deployed by Zeon remnant forces in UC 0096.
Mobile suits were developed by Principality of Zeon initially for space battles. When the Zeon forces were deployed on Earth, they realised that the mobile suits lacked flight capability.
To overcome this weakness without having to resort to expensive modifications that might reduce the battle capabilities of the suits, the Zeon scientists developed the Dodai YS.
The Dodai was an independent aircraft that acted as a platform to carry the mobile suit. This allowed it to ferry different mobile suits since it was not fixed to one particular unit.
When the aircraft had dropped off its mobile suit, it could continue to function as a bomber to provide aerial support.
The Dodai was equipped with eight missile launchers. These could be used for air-to-surface or air-to-air attacks.
Behind the scenes
Kunio Okawara was the original mechanical designer.