In the dim and distant past, I recall reading an article titled 'The annals of the Polymorph' which was all about variable geometry wing AC. some had swing wing like the F111, others, the whole wing swung about a central pivot.....and some, and I think this is one....the wing was built in sections like a car aerial and could 'concertina' in and out to vary the wing area.
Only two problems with this answer....
One, I cant remember the name of the AC with the wings that fold like an aerial
and two....I'm wrong ?