(Slightly off subject but question for Wouter – are you by any chance familiar with the “theory” and the maths that is being applied to research being conducted into “hyper-cavitation” for submerged “missiles” (formally called torpedoes) at present by the military?)
I'm aware of it and have read some articles on it but I'm not familiar enough with it to be knowledgeable about the math and physics applied.
But I always did feel that it bore strong resemblence with a ship hull design of the earlier 20th century. Here a normal but rather box like cargo ship hull had wide trenche all along its keelline that was filled with air and kept under pressure. This meant that a very large portion of the "wetted area" wias in fact between this aircushion and the water which lead to a lower drag overall. This idea was tested by never fully persued.
Wouter
Wouter Hijink Formula 16 NED 243 (one-off; homebuild) The Netherlands
