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Loco Speedometers

Aus loco discussion mailing list  
82 and 90 class use a new system whereby a hub drive turns a small wheel that has 500 tiny holes. There is an LED and LDR either side of the holes and as the light shines through the holes a signal passes. 500 pulses is one wheel revolution. This signal is then fed into the Dattalogger and the logger has the locomotive wheel diameter pre-programmed. The logger then does a calculation based on wheel revolutions and wheel diameter and it gives a speed output in kph. This signal is then displayed on the logger, drivers speedo and is also fed to the low speed indicator and speedmaster (low speed controller) and EM2000 (on board computer). The radar is used to give the EM2000 a speed signal however it is not effective at speeds below 4 kph so a second input from the datalogger is used at speeds below 4 kph. Hope this makes sense. If anyone would like to know more about it just email me.
Cheers
Bob

John Regan wrote:

Can anyone tell me how loco speedos are operated in Australia.  Are they hub
driven off the axle or driven off the traction motor or do they use a radar
system etc.
Some locos here are having the hub drive removed and replaced by radar
operated speedos, which seem to be far better and not prone to 'going off
the clock" during wheel spin.
It seems strange to be checking around a loco and see the hub drive missing!

cheers

John Regan
reganjd@clear.net.nz
Christchurch
NEW ZEALAND

+64 3 338 4260 (home)
+64 21 362 143 (mobile)
ICQ #15462976

-----Original Message-----
From: Raymond McDermott <raymcd@ozemail.com.au>
To: Aus loco discussion mailing list <Ausloco@listbot.com>
Date: Wednesday, 8 December 1999 18:51
Subject: Re: Totally uncool Pretty Park.exe

>Aus loco discussion mailing list
>
>At 14:21 6/12/99 +1000, you wrote:
>>Aus loco discussion mailing list
>>
>>Who is the dork who posted this - For some reason I am unable to delete
the
>>.exe file - can someone help please?
>>
>>Cheers
>>
>>Mark
>>
>Mark
>
>I had no problem deleting .exe file with XTREE GOLD file manager. Eudora
Pro
>for email puts attachments in ATTACHMT directory, from which it is easy to
>move, delete, etc.  There seems to be no equivalent with Bill Gates Outlook
>Express; where do email attachments live??
>
>Ray
>
>
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______________________________________________________________________ To unsubscribe, write to Ausloco-unsubscribe@listbot.com ______________________________________________________________________ Sears Gift Cards now available online! Need a gift idea? Purchase the easy-to-use gift certificate redeemable at any Sears store nationwide. Buy a Gift Card today at http://www.listbot.com/links/sears3 and shipping and handling is free!