My own calculations on whether you could strap in a FF generator to a commercial airplane indicate that it is probably not feasible, owing to the amount of thrust that would need to be generated to replace the Jet-A driven engines would be in the department of 50+ FF units for a full sized 747-400. So either they need to be miniaturized or multiple focuses have to share the same shielding. And then there’s still the issue of getting propulsion from the requisite electrical energy. If you have to carry your FF plus some sort of propellant than you really are better off just synthesizing Jet A on the ground.
