west point
Engineer
Forgot to cover EMUs under CAT. When Amtrak ( PC) started tests of the original Metroliners it was soon found that under the variable tension ( PRR) CAT with more than 3 PANs on a train at certain high speeds would set up standing waves on the contact wires that would foul the PANs. Now NJT EMUs have been limited to 100 MPH not necessarily for that reason but ? ?. We all know the excessive costs of getting constant tension CAT on the NEC. Needs to be done but ? ?
Constant Tension CAT does not have those problems as seen world wide that operate EMUs.. That may be one reason for NJT, , MARC, and maybe SEPTA to use loco hauled trains up to 125 MPH ?
Constant Tension CAT does not have those problems as seen world wide that operate EMUs.. That may be one reason for NJT, , MARC, and maybe SEPTA to use loco hauled trains up to 125 MPH ?