My experiment Circular motor driven by tangential magnetic force showed tangential magnetic force making a circular coil rotate. Someone has objected that the particular field of the quadripole magnet was confusing. So, I made a motor with regular magnets to show that tangential force exists generally in all kind of magnetic field.

Please read the article at
Tangential force motor with regular magnets http://pengkuanem.blogspot.com/2014/03/tangential-force-motor-with-regular.html
or document word with the video integrated https://www.academia.edu/6395827/Tangential_force_motor_with_regular_magnets

Tangential force motor with regular magnets pdf or document word with the video integrated