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From: jar@siemens.UUCP
Newsgroups: net.railroad
Subject: Re: Ties
Message-ID: <30700003@siemens.UUCP>
Date: Mon, 23-Sep-85 09:57:00 EDT
Article-I.D.: siemens.30700003
Posted: Mon Sep 23 09:57:00 1985
Date-Received: Wed, 25-Sep-85 12:38:28 EDT
References: <1591@brl-tgr.UUCP>
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Nf-ID: #R:brl-tgr:-159100:siemens:30700003:000:1256
Nf-From: siemens!jar    Sep 23 09:57:00 1985


	                             Would magnetized "sleds" using a
	 generator driven by wheels during breaking be more effective
	 than breaking only with wheels? 

It seems to be effective because in Germany every passenger car which
may run 125 mph has magnetic brakes. There are 4 sleds per car and they
are powered by the locomotive (as far as I know). This breaking system
is in addition to the regular system (with air pressure). I do not know
which system is used in which case although I used such a train because
the regular system has now discs just like the cars have and it doesn't
make the awfully noise. There is also a third system only on the locomotive
where the motors are used as generators. This system is the most effective
one because the energie feeds the powersupply and is not converted to heat.
This system is in use as long as it provides a sufficient reduction of
speed, if necessary another system is used in addition. Just another detail
I read in a railroad magazine in Germany: If you use the magnetic brakes in
an emergency to reduce the speed from 125 mph to zero, the force will be as
strong as a DC-10 during take-off and you must repair the tracks thereafter
because in this case the slids are nearly clued to the tracks.


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