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- From: jsm@phoenix.Princeton.EDU (John Scott McCauley Jr.)
- Subject: high-speed turnouts (points)
- Message-ID: <1993Jan25.194010.13882@Princeton.EDU>
- Originator: news@nimaster
- Sender: news@Princeton.EDU (USENET News System)
- Nntp-Posting-Host: phoenix.princeton.edu
- Organization: Princeton University
- Date: Mon, 25 Jan 1993 19:40:10 GMT
- Lines: 18
-
- I have a few questions about turnouts used for high-speed passenger service:
-
- 1) What are typical frog numbers? Anything above #20? Do these big switches
- require multiple switch machines?
-
- 2) What are typical speed restrictions? Does a train have to slow down
- through a #8 or a #10 switch if the switch is set to the straight route
- rather than diverging route? Are there different limits for facing-
- point switches (train reaches points before frog) and trailing-point
- switches (train reaches frog before points)?
-
- 3) Does a 'swing-nose' turnout help? I think a swing-nose switch has an
- active frog. Any other types of switches out there?
-
- 4) Are wye switches frequently used to save space where large frog numbers
- are used?
-
- Scott
-