The latest three-view drawing of the YF-17 shows several recent design changes, including the addition of nose strakes, bell-mouth air intakes and vertical and horizontal tail surfaces of higher aspect ratio than at first planned.

The sole example of the Beardmore Inflexible built to investigate the possibilities of what were considered (in the 'twenties) to be ultra-large all-metal monoplanes.

The SE 200 No 03 (F-BAIY), the second example of this flying boat type to fly, which initiated its test programme in April 1946.