Even then, it would be better to have the option of using them as expendable munitions while still providing decent recovery abilities. Unless allowing for RTB makes them drastically more expensive, complex, or less capable, then it's always better to be able to reuse them in case of a broken kill-chain or overkill.Such a large, complex and expensive UCAV would obviously be better served as a normal UCAV instead of an expendable munition, but if you can trade an enemy AWACS, tanker, MPA, bomber or even large UAV like a Global Hawk for one of these, then it’s a hell of a trade. And to a large extent, a big part of UCAVs over traditional manned jets is their expendability. This would just be a step beyond but still not wildly out of the general acceptable use parameters.
It's not like you'd have to parallel park each truck just right individually using the engine. Simple (enough) mechanical locks can achieve tremendous precision if the platform itself is engineered to tight tolerances.I just can't stop thinking about how precisely the constituent tucks would have to be aligned in order for the electromagnetic rail system to actually work.