A B-21 is suggested as large enough to hold drone-control computers if its bomb bay is given over to that equipment. This would trade bomb-carrying capacity for the space required by the control system. A competing objection is the electronic noise produced by such an installation. The concern includes several kinds of noise, rather than only the 60 Hz hum proposed in a follow-up question.
Notable Point · 1:54:53-1:55:34
Using a B-21's bomb bay for drone-control computers
A proposed drone-command conversion trades the B-21's bomb load for computing space, with electronic emissions still an objection.