I leave most of the technical details to Captain Roop
and the gang, but I can tell you that there are a pair of standard torpedo launchers above the deflector dish, a single quantum torpedo launcher below the dish and another quantum torpedo launcher on the bottom of the saucer section. Rapid vs. burst fire is a question I can't answer.
By the way, real life has been hell on wheels for me the last couple of months and I really haven't made much headway on the Grandeur
. I hope to be able to get something more done on it in the near future but I can't make any promises at the moment.