Pictures of the No3 testing tank at Cowes, Isle of Wight, UK, in use and during construction.

model hovercraft

model hovercraft in no3 tank

No 3 Tank construction

No 3 Tank construction

No 3 tank at Cowes, IoW. The models seem very big for the tank but this is OK because hovercraft have a very small water displacement. The lower model is actually an RC free flight model.
The right hand photos are of the construction.