on the topic of 'drive system as weapon', there was a part of a Trek/B5 fic on Spacebattles (TaskForce 43? something like that), a group of Federation Warships tossed into the B5-verse accidentally.
Skipping the set up, the Feddies were trying to talk down the main Mimbari fleet from committing genocide, and when the fight started, a trio of smaller Federation ships swept the length of the Mimbari fleet just barely into warp. The subspace distortions wreaked havoc on the Mimbari's crystalline ships (and also messed up the engines of the 3 Feddie ships).
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"I've always wanted to be somebody, but I should have been more specific." - George Carlin
Skipping the set up, the Feddies were trying to talk down the main Mimbari fleet from committing genocide, and when the fight started, a trio of smaller Federation ships swept the length of the Mimbari fleet just barely into warp. The subspace distortions wreaked havoc on the Mimbari's crystalline ships (and also messed up the engines of the 3 Feddie ships).
___________________________
"I've always wanted to be somebody, but I should have been more specific." - George Carlin