  The self-propelled, longstanding rotation of the polymer tubing containing
camphor continuing for dozens of hours is reported. The rotator is driven by
the solutocapillary Marangoni flows owing to the dissolution of camphor. The
phenomenological model of self-propulsion is suggested and verified. Scaling
laws describing the quasi-stationary self-propulsion are proposed and tested
experimentally. The change in the surface tension, arising from the dissolution
of camphor and driving the rotator is estimated as 0.3 mN/m.
