What is the maximum amount of electricity a nuclear battery could produce and still be small enough to mount and operate inside anaircraft? For example a Boeing 717. The 717 has a max payload of 12,000kg, but let?s keep it around 6,000kg so we have enough weight to spare for other cargo. As for the type of ?nuclear battery? whatever you think would be most practical on an aircraft. Would it be better to run the generator/battery while on the ground to charge some capacitors/chemical batteries and then shut it down and button it up while in flight? Similar to how old Diesel submarines would run their engines on the surface to charge up their batteries.