but in any event autogyros can't hover so they're not replacements for helicopters.
While it can't hover like a helicopter you can get it to fly really slowly into a really strong headwind (as with all other planes). It's almost like as if you're hovering.
Technology, as it is today, is all too fleeting. New technology is being pushed out at an ever increasing rate with the new products quickly supplanting the old. The old is then quickly forgotten. I applaud the effort of this group in its work to keep a living record of the heart of the machines that have been the core of most of lives for almost half a century.
On a slightly note, I believe we need better cataloging of technology in general as many old file are effectively being lost due the technology require to read them no long exist. Of course this raises further questions of how to maintain such cataloging as the cataloging infrastructure ages so that the data doesn't get lost. Oh what a vicious cycle it is.