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| Old Piggy Backs (1224417) | |||
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Old Piggy Backs |
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Posted by Avid Reader on Fri May 24 11:11:45 2013 Out west of the Mississippi, Piggy backs may have happened. Third Rail Northwestern Pacific.  No, that's not Long Island.  These Northwester Pacific Third Rail Electric cars will later be transferred to Pacific Electric, modified, and run on a fan trip.  Interurban Electric of Berkley  Interurban Electric Railway Company ROW next to Southern Pacific Electric ROW   Pacific Electric at the Terminal   Street running. Singles and doubles.    And on a private ROW  Remember those Northwestern Pacific Electrics? Well here they are again,but now with trolley poles. FROM THE KEN HARRISON COLLECTION Pacific Electric 5 car blimp trip on American Avenue June 30, 1957 In this picture of the 5 car train of ex-NWP cars on the fan trip, I believe the limitation on train length was because of the motorman's brake valve, as well as some other details in the brake system. When delivered to the NWP, all the cars had a brake valve with no equalizing piston, which means that train length was limited. When the brake valve has an equalizing piston, train length is limited only by the capacity of the drawbars. It is, however, standard with all interurban and suburban mu equipment that no more than 10 motor cars may be MUed at any one time because of the current capacity of the control circuits. I thought PE upgraded the brake systems on all of the ex-NWP cars (the one at Perris has been), but perhaps they didn't. I'll have to check around. All the SP cars (including the ones which didn't go to the PE) were not subject to this limitation. PE liked the NWP cars because they would go 50 or 55 mph, and they were quite disappointed with the SP cars, which were designed to go 43 mph. The ex-SP were subject to a series of modifications to improve their performance. I know of no reason why an NWP car couldn't be MUed with an ex-SP car, but I'm not that familiar with the PE's daily practices    Southern Pacific |
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