Developments over recent years owe much to the efforts of companies and individuals involved in construction and flight testing of prototypes.
Clockwise from top left:
Sixth-scale model assembled from two DJI quadcopters and operated here by Phil Martin in Lancashire UK.
Half-scale prototype flown by Martin Andrews in Somerset UK (as pictured), and later by Ben Sena in California.
Full-size model flown in Lancashire by Alan of Drone Images and later (as pictured) at Llanbedr Airport by Austin Laws.
66%-scale model flown by Angus Benson-Blair, Somerset UK.
19th November 2022