Anyone who wants to experience the power of somatogravic illusion only needs to sit inside a full flight simulator during take-off - the sense of acceleration is created by using the illusion in reverse.
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Interesting that. Done lots of simulator sessions but haven't struck that problem. Have seen airsickness especially when taxiing and doing a 180 on the runway. The fix for airsickness was to close your eyes before starting the turn and don't open them until taxiing straight. You need a kind and understanding instructor, though. Also happens when coming out of reverse when slowing up after landing.