[PRCo] Re: PCC__Speeds

[Jim Holland]

Good Morning!


> rogertrolley.1 at juno.com wrote:

> Jim Holland Commenting about 42 mph top speed for the
> PCC's brings up the speed subject again.    I belive most
> PCC's were quite capable of reaching speeds in excess
> of 42mph.


	The story I told related to this speed limitation stated Just
That  --  we  WERE  doing more than 42-mph!    Outbound with a
1700-series Interurban on Library, PM rush, full load, heading
south from Hillcrest thru Lindermere the Limit-Relay caused the
power to cut which means we reached 42-mph.    We then rolled
downhill and physics tells us we gain momentum at such times.   
It wasn't until the car  *slowed*  to 42-mph rolling uphill
toward Brightwood that we got our power back.

	How fast were we actually going    ---- DoNut Know!

	*Possibly*  as fast as 50-mph or somewhat close to it.

	And I believe that a study of physics would indicate that the
motors would self-destruct at much over 50-mph.    I am hard
pressed to believe that without some actual  *controlled* 
experiments.    Fred has already stated this.

	One former SF-Muni operator claimed that a policeman clocked him
at over 55-mph on the N-Judah.    Anyone familiar with SF knows
that this line runs along the short ends of the blocks along
Judah so that there is an intersection about every 300-feet!   
Fifty-Five--mph on city streets  --  absolutely  NO  way.

	And remember that someone claimed that one PRCo PCC was doing
90-mph  UPGRADE  on the prw on 87-Ardmore!


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James B. Holland

• Holland  Electric  Railway  Operation....... 
  "O"--Scale St.-Petersburg Trams Company (SPTC)
	Trolleycars and "O"--Scale  Parts
		including Q-Car
	mailto:pghpcc at pacbell.net

• Pennsylvania Trolley Museum
	http://www.pa-trolley.org/
• Pittsburgh  Railways  Company  (PRCo),
	1930  --  1950
• N.M.R.A.  Life member #2190;
	http://www.nmra.org

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