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| Re: Pre-GOH R-46 Questions (320169) | |||
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Re: Pre-GOH R-46 Questions |
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Posted by Jeff H. on Fri Oct 6 20:08:35 2006, in response to Pre-GOH R-46 Questions, posted by SilverFox on Fri Oct 6 06:53:43 2006. 1) The distinctive whine was from the "static converter" whichconverted the 600 volts to battery voltage and which also created the AC for the lighting. Most of the static converters from that period were buggy. The R42 converters were notorious for dark cars. The whine was the switching frequency of the converter, just like a TV set. 2) R44 and R46 had different air brake packages. I'm trying to remember.....think R46 was a GE product and R44 was WABCO. The R46 package was completely replaced during GOH. The whistle noise came from the package under the car so new package, new noise. 3) Don't get me started on the controller. The old slide controller worked a potentiometer because the brake package was electronic. During GOH the decision was made to go back to a pneumatic brake valve and a few people in car engineering got it in their head that there was just no way to retrofit the slide handle to a pneumatic valve. The R44s had been converted to the rotary handle a few years earlier because their brake system was even more problematic. Despite crew complaints about the cineston handle, they went ahead with a similar product (but made by NYAB) with the R46 GOH program. 4) The baloney springs were added after a blind person mistook the gap between the cars for a doorway and died. |
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