[PRCo] Re: [Fwd: Nachods]

[Fred Schneider]

Because they short across the wheel or shoe from one runner to the  
other, they don't always like mixed operation of shoes and wheels.   
The width is relatively critical.



On Sep 10, 2006, at 1:12 PM, Jim Holland wrote:

> -------- Original Message --------
> Subject: 	Nachods
> Date: 	Sun, 10 Sep 2006 08:50:29 -0700
> From: 	Jim Holland <prcopcc at p-r-co.com>
> To: 	pittsburgh-railways at dementia.org
> References: 	<10839821.1157463296752.JavaMail.root at web26>
> <44FDE3D0.60104 at p-r-co.com> <45036382.9090000 at p-r-co.com>
> <000a01c6d4d4$57d85b30$0380c80a at DFCramer>
>
>
>
>> DF Cramer wrote:
> .
>
>> My experiences working with Nachod contactors at PTM show that they
> work the vast majority of the time but they can easily miscount a  
> car in
> or out, thus leaving an incorrect signal. Speed and pulling power  
> while
> going through a contactor tend to determine the reliability. A worn
> contactor or a worn trolley wheel can also be the culprit.
>
> .
> Some time back Fred had mentioned that PTM had problems with the
> contactors because of possible different size wheels being used --
> forget the details, however.
> .
> The first I heard of a problem on PRCo was the cornfield meet  
> between an
> Interurban and a 12 on the dinky track between Castle Shannon and
> Mt.Lebanon. I had ridden the system extensively before that -- 65 line
> in particular where there were multiples of Nachods -- and never
> experienced any problems.    Doesn't mean it didn't happen, but I  
> didn't
> experience same.
> .
> .
> .
> Jim___Holland
>
>
>