Tested in v5.53:
![](http://i11.photobucket.com/albums/a155/blueemu/FourMod.jpg)
... looks like it works fine. I'm getting a pretty good turn of speed out of that arrangement... 85,180 kps... considering that the two 1,000-ton FACs are pulling 51,000 tons of dead-weight (a 26,000-ton Command Cruiser and a 25,000-ton BattleCruiser, neither of which has any Hyperdrive engines).
Here's how it works:
A ship with a tractor beam can have only one link, active or passive. A ship without a tractor beam can have any number of passive links. So a multi-module ship requires at least one module with
no tractor beam mounted on it... ie: three tractor beam-equipped modules and one "deadweight" module.
In the example above, BC King Henry IV and both Hyperdrive Modules are tractor-equipped. CC President Abraham Lincoln has no tractor beam equipment... so all of the modules must link directly to it.