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Re: Video: R-1 #103 Testing At Hoyt-Schermerhorn

Posted by BLE-NIMX on Thu Nov 14 23:47:51 2019, in response to Re: Video: R-1 #103 Testing At Hoyt-Schermerhorn, posted by randyo on Thu Nov 14 22:00:16 2019.

The brake magnets on the PA1-3s were classified as E2S but were essentially the same equipment. The R40S-M and R42s had the 2 part cough since they used J1 relays dropping down from higher brake cylinder pressures while the R38s had more of a single sound release using J14Ds. As a new switchman at the time I got to work Concourse track test and got to see the brake cylinder gauges in action during sequence testing. Straight air would drop from 70 before it equalized to the B.C. which is limited by its J relay types. Apparently that equalization, or B.C. air drop causes for the second puff during a release, still happens today. That RT2 system also included a blended brake canister on the brake cylinder line which would absorb air so brake cylinders would not slam on hard if operators were in full service position during dynamic brake fadeout or other lockout magnet functions.

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