Engine

Propulsion Drive
The Propulsion Drive is a necessary engine for ships such as the SL-5 Cargo, the Cargo SL-25 , the Light fighter X320, the recycle , the spying probe and the elong distance probe. Each level increases the speed of vessels of 10%.

Propulsion Drive at the following levels unlocks the following items
 * 1 -> Light fighter X320
 * 2 -> Cargo SL-5
 * 3 -> spying probe
 * 4 -> Sensor Exploration
 * 6 -> Cargo SL-25, Recycler

Impulse Drive
The Impulse motor is a new means of propulsion required for vessels such as the Destroyer, the Heavy Fighter X832, the Cargo SL-250, the colonizer, the Mega recycler and carrier ships. Each level increases the speed of vessels of 10%.

Impulse Drive at the following levels unlocks the following items
 * 2 -> Heavy Fighter X832
 * 3 -> Colonizer
 * 4 -> Destroyer, carrier ships
 * 7 -> Cargo SL-250, Mega Recycler

HyperSpace Drive
The Hyperspace is a new means of propulsion required for vessels such as the Imperial cruiser, the battleship, the Voyager, the terror drone and the mothership .Each level increases the speed of vessels 10%.

HypserSpace Drive at the following levels unlocks the following items
 * 3 -> terror drone
 * 4 -> Battleship
 * 6 -> Imperial Cruiser
 * 7 -> Mother Ship, Voyager