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- Path: sparky!uunet!spool.mu.edu!wupost!waikato.ac.nz!comp.vuw.ac.nz!cavebbs!clear
- Newsgroups: rec.models.railroad
- Subject: Re: Info about G Scale
- Message-ID: <1992Nov19.103752.9977@cavebbs.welly.gen.nz>
- From: clear@cavebbs.welly.gen.nz (Charlie Lear)
- Date: Thu, 19 Nov 92 10:37:52 GMT
- References: <1992Nov13.165125.17153@b30.ingr.com> <63950007@hpscit.sc.hp.com>
- Organization: The Cave MegaBBS, Public Access Usenet, Wellington, NZ
- Lines: 25
-
- In article <63950007@hpscit.sc.hp.com> mcghee@hpscit.sc.hp.com (Glenn McGhee) writes:
- > According to the Handbook of Chemistry and Physics, aluminum is a much
- >better conductor than brass. Brass has an resistance of 7.00 microhoms
-
- Which is why aluminium is the metal of choice for high-voltage overhead
- transmission wires.
-
- Aluminium for model rails (especially in the larger gauges) has severe
- drawbacks - the surface layer of aluminium oxide is a poor conductor, and
- the reactivity of aluminium means you can never eliminate it entirely.
-
- In addition, the surface oxide seems to absorb oil and dirt really well,
- leading to slipping and poor pulling power with metal-tyred wheels.
-
- Live steamers in England thought aluminium rail was a great idea in the '70s,
- but soon found that traction dropped to almost zero when the rails were
- even slightly damp with dew or rain.
-
- (Steps back to wait for assorted G-gaugers to chime in saying they have never
- had a single problem with aluminium track)
-
- --
- Charlie "The Bear" Lear | clear@cavebbs.welly.gen.nz | Kawasaki 750GT DoD#0221
- Databits Computer Co / Shareware Distribution NZ Ph/Fax +64 4 564-5307
- PO Box 2009, Wellington, New Zealand The Cave MegaBBS +64 4 5642269 V32
-