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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!swrinde!emory!sol.ctr.columbia.edu!destroyer!iunet!hal9k!delbert.big
- From: delbert.big@hal9k.ann-arbor.mi.us (Delbert Big)
- Newsgroups: rec.railroad
- Subject: Grand Canyon Railway
- Message-ID: <636.134.uupcb@hal9k.ann-arbor.mi.us>
- Date: 20 Dec 92 10:59:00 GMT
- Distribution: world
- Organization: HAL 9000 BBS, (313)663-4173, Ann Arbor, MI, USA
- Reply-To: delbert.big@hal9k.ann-arbor.mi.us (Delbert Big)
- Lines: 30
-
-
- In a recent post from Jeff Hintzman;
-
- JH>Now to the question: Why do friction bearings limit the speed of the
- JH>train? Related question: is it true that most railroads will not allow
- JH>friction bearing stuff to pass over their rails anymore? What does
- JH>this mean for tourist railroads and excursions? What the heck is a
- JH>friction bearing, anyway (I can probably guess...)
-
- A friction bearing is where a brass bearing like plate device that
- is concaved on on side to rest on the axle. The other side sits in
- the truck frame. The journals have oil and waste (looks like a mop
- head in a sence) to constantly lubricate the bearing race on the axle.
- There is probably about a 3 by 3 inch brass to steel contact. In the
- more common days of the *hot box*, these journal boxes were not filled
- or the waste wore out not lubricating the axle. In severe cases the
- oil in the journal box could catch fire or in the most severe the
- axle could be sheared.
-
- Friction bearings are not uncommon on freight cars totally. I would
- suspect speed is set more by track conditions such as grade and
- curvature. The other thing that might come into play, is the faster
- you go the more chance of a disatourous accident could happen. A major
- accident with alot of legal litigation, could bankrupt a operation such
- as the Grand Canyon RR real quick.
-
-
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