Or an honest post-mortem that explains the shortcomings of the proposed aircraft concept: design, aerodynamics, autonomous stationkeeping, RF comms, logistics,

Or an honest post-mortem that explains the shortcomings of the proposed aircraft concept: design, aerodynamics, autonomous stationkeeping, RF comms, logistics, or whatever. The current trend of publishing positive results but completely hiding negative results is deeply harming to research and engineering, since it doesn't allow future attempts to learn from previous mistakes.