An easy way to Gravimagnetism
  One of the numerous results of the Theory of General Relativity is the appearance of Gravimagnetism, described already by Thirring and Lense in 1918 [THI 18]. Its understanding normally remains reserved to specialists.   This article presents a simple classical analogy to bring the description of Gravimagnetism within the reach of beginners. The article describes a classical model calculation on the level of undergraduate students and mentions the situation of the modern experiment. 
Claus W. Turtur