Heterodox thought: perhaps the Gazelle and Patrol Cruiser can be more closely related than canon tells us.
Ignore the hardpoint issue for this exercise.
Assume a 320/400 ton Escort:
* 80t internal jump fuel
* J4, 4G drives
* some armor
* two PA barbettes, with a laser/missile turret variant
* two triple pulse laser turrets
* 20t Gig, grappled
* Two 40t module bays
Modules include:
* demountable fuel tank
* droptank
* patrol module (troop barracks + GCarrier)
* ...other modules...
The traditional patrol cruiser would have a 40t demountable fuel tank, and the troop barracks/GCarrier module.
The Gazelle would have two 40t drop tanks. Note that if the tanks are dropped, 10 tons of jump fuel remain in the craft. This could be a safety consideration, so that the ship doesn't enter a system with completely dry tanks.
There's also a third design that has two non-fuel modules installed, leaving the ship with only Jump-2.
Ignore the hardpoint issue for this exercise.
Assume a 320/400 ton Escort:
* 80t internal jump fuel
* J4, 4G drives
* some armor
* two PA barbettes, with a laser/missile turret variant
* two triple pulse laser turrets
* 20t Gig, grappled
* Two 40t module bays
Modules include:
* demountable fuel tank
* droptank
* patrol module (troop barracks + GCarrier)
* ...other modules...
The traditional patrol cruiser would have a 40t demountable fuel tank, and the troop barracks/GCarrier module.
The Gazelle would have two 40t drop tanks. Note that if the tanks are dropped, 10 tons of jump fuel remain in the craft. This could be a safety consideration, so that the ship doesn't enter a system with completely dry tanks.
There's also a third design that has two non-fuel modules installed, leaving the ship with only Jump-2.