H4 Book of Engineering 



would work in combination with a magnetic 

 brake control. 



Although the design of the overhead 

 track for the railplane is planned for steel 

 construction, the inventor points out that 

 reinforced concrete, or even timber, can be 

 employed if these are cheaper or more 

 easily obtained. Further, he advocates that 

 an elevated roadway either for fast motor 

 traffic or for pedestrians could be provided 

 without difficulty. 



Every effort has been made to reduce 

 friction to a minimum, thus the car itself 

 is stream-lined, just like the gondola of 

 an airship. Running on a single overhead 

 rail, and equipped with modern ball- 

 bearing devices for all rotating parts, 

 there is comparatively little friction to be 

 anticipated. 



The air screws are driven by electric 

 motors, whose output is 60 b.h.p. at 1,200 

 r.p.m. on a one-hour rating. Should it be 

 necessary to stop the car suddenly, this can 

 be done by reversing the car screws, and 

 so easily would the stoppage be made 



