What is the purpose of the 1HS jump drive? It is labelled "Self-jump Only", which led me to believe that I could use it on a ship design regardless of ship size, as long as it was only jumping itself, such as in the survey swarm idea mentioned by Redshirt (hxxp: aurora2. pentarch. org/index. php/topic,4977. msg50831. html#msg50831), or in my troop transports. When I add the drive (which can handle a 1250 ton ship) to my 5000 ton survey ship, I get a design error saying "Jump engine is too small for this design".
Is this something only intended for FACs? Although I'm not sure how that would be useful, it would seem to be better to devote limited FAC hull space to critical components and house it in some jump-capable mothership instead.