A good story which I first read fifty years ago. But even then I had severe doubts about how the belt tension could be controlled. And the potential worst case accident would overtake ant research into rocketry __________________________________________ David C Brown 43 Bings Road Whaley Bridge High Peak Phone: 01663 733236 Derbyshire eMail: dcb.home@gmail.com SK23 7ND web: www.bings-knowle.co.uk/dcb *Sent from my etch-a-sketch* On 1 November 2017 at 16:36, Van Horn, David < david.vanhorn@backcountryaccess.com> wrote: > > > Interesting thanks. A problem with this has been pointed out by David. > Another is that you could only leave the train. > Coupling a coach on a running train would be very dangerous. With some > very sofisticated help from technology (or some late 18th century boldnes= s > :-)) it could surely be done, but it would need to be failproof and the > space needed to do it would be great, increasing proportionally with the > running train's speed. Surely undoable in cities or urban areas. > > > For fun, I recommend "The roads must roll" by Robert Heinlein > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .