[PRCo] Re: Cleveland_--_Shaker

[Fred Schneider]

Does it matter?   That is 75 year old obsolete technology.   Transit  
Research went out of business a half century ago.   It's successor  
merged with ATA more than 30 years ago.   The Westinghouse files are  
in a cave underground.   They don't make the stuff anymore.    
Westinghouse as a company doesn't even exist.   Resistance control  
technology was phased out 25 years ago.   DELETE KEY.

On Feb 2, 2007, at 11:16 AM, Boris Cefer wrote:

> I suppose these facts resulted from theoretical calculations, not  
> from field
> tests of actual PCC cars. That would be hardly possible. I assume only
> several traction motors were tested indoors to obtain tractive  
> effort curves
> and these were confronted with theoretical curves of train  
> resistance based
> on Davis formula.
> Actual cars differ from each other and the results, let's call it  
> "42 mph
> distance" vary from car to car, but within certain limits. My  
> question is
> how far. 10%, less than 10% or even more when the line voltage and car
> weight are identical?
>
> B
>
> ----- Original Message -----
> From: "Fred Schneider" <fwschneider at comcast.net>
> To: <pittsburgh-railways at dementia.org>
> Sent: Friday, February 02, 2007 3:31 PM
> Subject: [PRCo] Re: Cleveland_--_Shaker
>
>
>> We've been through this many time on this list Boris.
>> But it remains that if
>> you put a seated load in your PCC and put 550 volts on it, it is
>> going to get to about 25 mph by the end of the block and 42 miles per
>> hour by the end of the mile....
>
>