In case you didn't get what he was saying, try putting some Mjolnirs around a node in FRED2, and have then "point to" the node. They will turn their sides to the node. The side their beam cannon is on is actually the left or something. So even if they had a turning speed but no velocity, and they were given orders to attack any hostile ships, they would face their sides towards the enemy ship, thus rendering the beam turret useless.
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"He who laughs last thinks slowest."
"Just becase you're paranoid doesn't mean they're not out to get you."
"To err is human; to really screw up you need a computer."
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Sandvich Bar, the CapShip Turret Upgrade, the Complete FS2 Ship List and the System Backgrounds List (all available from the site)