The damage to their ion drive must be more extensive than we thought.

"I hope they'll soup up the ion drive even more."

"Besides, it'll give me a chance to see the ship's ion drive in action."

One of the fuel-supply ships lost a main ion drive.

We began testing the ion drive and the crew habitat.

So first I want to add an ion drive to our equipment.

"Earlier than that, actually- this one still has an ion drive."

He was looking over the pod now, watching the approach of the ion drive.

What hurt us was an explosion between the ion drive and the cable pod.

"Are you trying to tell me the Suliban ship runs off an ion drive?"