How do you unlock Palpatines wing on star wars ace assault?

You can't unlock Palpatine's wing in Star Wars: Ace Assault. The game does not feature Palpatine or any of his ships.

Star Wars: Ace Assault was released in 2005 and featured a roster of ships and characters from the Star Wars universe, but Palpatine's iconic "Death Star II Super Star Destroyer" was not part of the game.

There is no known method to "unlock" a ship that was not included in the game's original content.