In one of the designer diary's before Battlefleet Koronus came out I read a comparison between Grand Cruisers and Battle Cruisers and it said that Battle Cruisers were more for the Traders Militant who are heavy into fighting, whereas Grand Cruisers while maintaining impressive armament and armor to make them worthy warships would also be good for those who want to do more than just fight. Since my Rogue Trader group and I are of the opinion that if all we wanted to do was just fight we would have joined the Imperial Navy, when I finally got my own copy of Battlefleet Koronus I went looking through the Grand Cruiser hulls and found what I thought was the perfect ship for our group, the Repulsive -class Grand Cruiser (I was the member of the group assigned to the procurement of a ship and its outfitting).
In terms of weapons it had everything I was looking for. A prow slot for torpedo tubes, port and starboard slots for massive macrocannon broadsides, and a dorsal slot for long range lance batteries to work over the enemy. Then I noticed the problem. Due to an experimental warp drive installed on the Repulsive -class that none of the geniuses in the Adeptus Mechanicus thought to remove or make removable, there is a -10 penalty to all Navigation tests made by the Navigator during warp travel.
My group has mainly played Dark Heresy but inspired by the tales of the Spanish conquistadores in the conquest of the New World and given that we decided to put an Ascension -level Ordo Malleus campaign on the backburner until Daemon Hunters came out we decided to give Rogue Trader a whirl. Seeing how relatively inexperienced we are at Rogue Trader (although I have played Battlefleet Gothic which seems to be the basis of Rogue Traders space combat rules) I'd like the more experienced players for their analysis of the Repulsive -class Grand Cruiser.
I'd also like to ask for suggestions on weapons loadouts if my group does indeed decide to go with a Repulsive -class. For the Torpedo Tubes I've been considering the Gryphonne-class as its four torpedo tubes is exactly the same amount as that carried by the U.S. Navy's Los Angeles -class nuclear attack submarine, although if those reading this have a better suggestion I'm all ears. In terms of starboard and port broadsides the dizzying array of macrobattery choices has left me clueless as what to choose but since both the port and starboard have two slots I was thinking of a medium ranged macrocannon broadside taking up one of the slots on both sides, and something shorter ranged but packing more punch occupying the second slot in case our intrepid band of Explorers runs into one of an Imperial Navy officer's worst nightmares, the close ranged (by Imperial Navy standards) broadside firefight. While there aren't quite as many choices concerning lances I'd still like to hear suggestions on what kind of lance to put in the dorsal mount. From Battlefleet Gothic I know that whereas a macrocannon broadside is comparable to a carpet bombing by a B-52, a lance strike is more like a precision-guided airstrike (in American Air Force terminology). My experiences from Battlefleet Gothic ( which were also confirmed in the Battlefleet Koronus sourcebook) are that you strip down the shields of an enemy ship using the mass saturation broadsides of the much quicker firing but less destructive macrocannons and then proceed to gut the enemy ship using the slower firing but much more destructive and longer ranged dorsal lances. So could someone advise me as to which lance turret to use?
Finally, could someone tell me whether what I read about in the designer diary about Grand Cruisers being suited for exploration and trade and other activities besides war are true? My group and I are looking forward to getting into the Cold Trade and muscling in on the nephium mining (negating any advantages Chorda and Winterscale have by getting Ecclesiarchial support via a special deal to sell the majority of the nephium mined to the Ecclesiarchy at a "special" discount price which those pyromaniacal clergymen and Battle Sisters would love perhaps?). So if it turns out that Grand Cruisers really aren't cut out for "special" delivery runs of xenos artifacts and nephium for those fire-eating battle nuns and other high value cargoes and are more for charging through the middle of a Chaos fleet I'd like to know.