the australian airforce, I'm told, have one of those spinning
centrifuge seats and airsick trainees get to sit in it for periods for
a fair drubbing to get them insensitive.

Stealth Pilot

I have suspected that those work quite well after several sessions, but that
first session will leave you qaueasy for the rest of the day!!!

I only know because, long after I had effectively cured my tendency to
airsickness in real airplanes, I saw one of those infernal contraptions at a
fair. Supposedly, they were also used for astronaut training, and that
tenpted me beyond my meager restraint...

I'm still curious whether it really works as well as advertised, but I'd
have to be sure it would remain available continuously and on demand for a
couple of weeks. So it seems like I'm pretty safe. :-)

Peter