[PRCo] Re: Cleveland_--_Shaker

[Boris Cefer]

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....