no Book of Engineering 



practice that it was not thought worth while 

 continuing. 



The latest attempt at a mono-rail system 

 is known as the Bennie Railplane. An 

 experimental installation has been laid down 

 over some disused railway track at Miln- 

 gavie in Scotland. The total length of this 

 railplane is 425 feet, and the whole of the 

 equipment is full-sized, and not laid on the 

 model principle in which most of the mono- 

 rail systems have begun and usually ended. 



The object which the inventor has in 

 mind is really to obtain a system of high- 

 speed transport, which shall have all the 

 safety of the railway with the speed and 

 form of the airway. 



The Zeppelin-shaped car accommodates 

 50 passengers, and it is driven by propellers 

 placed fore and aft, with the object of 

 attaining a speed of 120 miles an hour. 

 The overhead structure, upon which the 

 wheels of the car will run, is quite an 

 imposing erection of girder work, and the 

 critic, at first sight, would be inclined to 

 say this will be a fatal obstacle to the 



