Does anyone have a view as to why autogyros haven't been more popular?? I know Wallis tried to sell some to the AAC some years ago but then the project stalled. I was also surprised they were competing with things like the Edgely optica that was trialled by the police a few decades ago.
They just seem a perfect tool for observation, power / pipeline inspection in fact anywhere where STOL is enough rather than VTOL and of course they are very capable in windy conditions.