Before coming up with the Zephyr variant for Star Smuggler, I tried a couple designs. These rules are somewhat related to Traveller, Snapshot or Striker as they darn near follow the design principals. Where as these games have tons of fuel to jump, Star Smuggler has a magic McGuffin called a Hypercharge. Ships are limited in range by the six charges they carry.
This version is shorter than the Zephyr type and has half as much crew space. The bays are arranged differently, giving 4 40 CU bays. I would think it would make a nice causal carrier or carrier escort ship. That block of cargo space could also be a barracks or brig.
Since I was already going small, this one is even smaller, eliminating the medical area, the weapons vault and both guns. It seems to be a pure hauler. It's bays are also divided into 3 40 CU sections.
This version is a single gunned hauler. It's huge, those areas near the rear could be more storage space.
I am not sure where I was going with this design. The center cargo bay has been given over to some sort of controls. Perhaps it is a lab, an advanced scanner station or controls to direct other ships. It has a single turret and a medical bay. The back of the ship has some odd equipment fittings for unknown purposes.
This is the largest Zephyr type ship, with 4 bays, the massive crew space, vaults and medical.
And of course for comparison is the actual Antelope II named the Zephyr. I probably should have made the rectangular cargo hold 60 CU as it is slightly bigger than the boat bay but smaller than the main cargo hold.