Tasmania may be the smallest state in Australia, but it contains no fewer than 495 separate Protected Areas with a total area of 2,203,383 hectares (land area: 2,201,962 hectares – 32.23% of the state’s area). 19 of these are National parks, totalling 1,430,762 hectares (20.94% of the state’s area).
... one finds the "rolling" point, but the gyro will also be accelerated to a smaller extent by the slipping friction.
The device is covered by US patents 3,726,146 ...