alan2here Posted May 22, 2009 Share Posted May 22, 2009 I was thinking about the pumatic pipe packet switching networks such as the one implemented under Paris a long time ago and it occured to me that they were replaced by electronic packet swiching networks for sending information, but that they would still make a good way of transfering goods. For example dried rice could be loaded into a tube in India and next week it would be in England. The longer the pipe the easyer it would be to get a low enough presure at one end to move the tube. Link to comment Share on other sites More sharing options...
Bignose Posted May 22, 2009 Share Posted May 22, 2009 You got one things backwards: the longer the pipe, the more pressure drop there would be, the harder it is to move things pneumatically. Link to comment Share on other sites More sharing options...
alan2here Posted May 23, 2009 Author Share Posted May 23, 2009 I think I was thinking about how much easyer it would be to suck into a long tube at first to pull something at the end along than a short tube at first, although yes, you would have to suck for longer to get to the same negative presure. Link to comment Share on other sites More sharing options...
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