The Slingsby CAMCO V-Liner was a proposed advertising aircraft of unusual design of the 1960s.
A requirement was identified for an 18-letter message to be displayed by means of electric lights, which would be easily readable at a range of 2–3 miles (3–5 km).
[1] The use of blimps (non-rigid airships) was not considered economical, while a fixed wing aircraft carrying such a message would be much longer than any ever built.
A prototype was expected to fly in late 1969, while it was hoped to build 42 in four years, with several hundred built over a longer period.
[4] The fire forced Slingsby into receivership, and although the company was rescued by Vickers Limited and resumed glider production, work on the V-Liner was abandoned.