Business: The Aerotrain Stalls

Less than a fortnight after its splashy exhibition runs, one of General Motors' experimental Aerotrains was back in the shop. The Pennsylvania Railroad, which had planned to start testing the Aerotrain on its New York-Pittsburgh run Feb. 6, postponed the date by at least three weeks. Reason: too much noise in the coaches, too much sway and roll on curves and at high speed.

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