The roof of 30th St. station was designed to be load-bearing to allow small aircraft to land...probably at the urging of Harold Pitcairn, (early developer along with Juan de la Cierva) of the autogyro and airmail advocate.
(This is his airmail aeroplane design) 
Today, derivatives of the V-22 Osprey might take their place implementing one heckuva commuter service.
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"Neither can his Mind be thought to be in Tune,whose words do jarre; nor his reason In frame, whose sentence is preposterous..."
Last edited by MaggieL; 05-21-2006 at 09:42 PM.
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