Talk:Arsenal Bird/@comment-3083606-20151208062100/@comment-27296538-20151208070639

Of course, running these huge ass aerial fortress would require tremendous amount of resources, which is why the design has to be as efficient as possible. Being efficient doesn't mean instantly having a low fuel consumption rate. Google definition of "efficient" is "achieving maximum productivity with minimum wasted effort or expense."

If having props means the FAS-01 would stay airborne much longer compared to jet engines, then this syetm would be considered more efficient.