The duct is 1 metre in diameter and is, by any measure, a bit big.

The first photo is of it strapped on the roof of the car on a windy and rainy night as I drove it home.

Below you can see it resting on the craft, just so I can get a feel for the size of it.

It is made of GRP and the yellow band is a Kevlar band to contain the blades if anything goes wrong.
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