We got a glimpse at what a new cross between a helicopter and a jet aircraft might look like after Bell released a new image. It's of a model used in wind tunnel tests of its entry in DARPA's Speed ...
Found and Explained Official on MSN

Bell X-22 and the VTOL transport that almost worked

The Bell X-22 was a ducted fan VTOL aircraft developed for the US military during the 1960s as part of a tri service ...