Parasite Racks, External Mounts and Reactive Armour (Was Re:

Here is the original post which stipulates placement and mass restrictions for
hull sizes:

Parasite Fighter Rack
[^]: symbol for Ex-rack squadron
30: Cost 1:Space

A ship may mount 1 squadron of Parasite Racked fighters per 30 Mass of Carrier
ship.Since this squadron is carried externally, any damage caused to the
Carrier vessel will destroy the Parasite Racks. If the
Racks are hit with fighters still embarked, roll a D6-1 and that many
fighters manage to disengage from the racks and launch. Parasite racks MAY be
used on civilian transports. This was what they were developed for in order to
provide escorts for merchants in high risk areas. A parasite rack may launch
at any time IN ADDITION to any normal fighter bay launches. They must be
recovered within the normal constraints of fighter recovery. Only Standard,
Superiority or Heavy fighters may be Parasite Racked as the racks do not
provide support for specialized weapon systems.

The cost is higher than a Bay mount because of the necessity of mooring the
racks to the pressure hull in a way that is strong enough to avoid ripping
them off at high accel. (and to avoid abuse) Also the one rack per 30 mass
refers to the usable area of hull to place them. I think one mass per rack is
perfectly acceptable given these restrictions.