Former Lieutenant Colonel Ansel Talbert wrote two series of newspaper articles claiming that most of the major aviation firms had started gravity control propulsion research in the 1950s.
原中校安塞尔·塔贝特（英语：Ansel Talbert）曽在报纸上写过两个系列的文章，声称大多数主要的航空制造企业都在20世纪50年代进行过重力控制推进的研究。