Taken on a small group of Islands in the Oslo fjord, called Hvasser. A 15 meter peice of fabric playing in the wind, scanned right to left in 21 seconds. Got really lucky with the clouds this time, allowing a single beam of sunlight in as a highlight.
What OP did was produce a functioning scanning back camera out of a pile of junk, which is definitely an achievement that deserves some props.
These types of mechanisms were more popular in the 90's and early 2000's before we'd nailed the ability to produce high resolution image sensors. Using quite rudimentary existing technology you can generate massive high pixel count images provided, of course, that your subject matter has the decency to hold still. These types of things were used widely for high resolution product photography and landscape shots destined to be reprinted in large formats.
Thanks for the explanation!