RE: BBN on IES20 Nov 2020 10:01
One of the ways in military design to get around the issue of 'not being around in 20 years' is that all design materials and data are end user suppled or held in a secure repository. If the supplier goes out of business, the buyers have rights to obtain and sort out (via insurance) fixes.
Most of a VFRB is simple (tanks, pumps, electrolyte... it is really only the key parts of the controller and stack that would be at issue, but I cannot see long term warranty being a great issue and suspect the major sticking point might be rather more on lifetime of parts (it is a pretty corrosive environment), and there being limited data around yet .. just hazzarding a guess, but if it was me, that is what I would worry about - the rest can be dealt with by pretty much anyone