Airship Stats will affect your ships both in Sky as well as Space
Stat
Effect
Fire
Increases damage dealt by attacks (affected by total energy)
Armor
Reduces damage taken from attacks
Speed
Determines who goes first each round (Attacker wins ties)
Luck
Increase or decrease chance of doing a critical hit depending on your luck vs. opponent's luck.
Having higher Luck than your opponent when doing a Plunder will allow you to steal a percentage of their acquired Relic Fragments, based on the difference.
Much like Gumballs you can "feed" your airship's to raise the ship's stats and improve the ship's unique skill (cannon). See Airship Upgrades.