Pennsy's R1

Dan Padova posted:

Browsing through my railroad photos, I came across this one, which I have viewed many times.  It's the Pennsylvania railroad's R1.  I had never noticed it before but the body appears to be welded, not riveted as in other photos of R1s.

If I remember correctly, the PRR had only one R1 (4-8-4), which they deemed unsuccessful, and thus the GG1 (4-6-6-4) was developed.

 All of the reading I have done on GG1s says that Raymond Lowey decided to have the GG1 body welded for aesthetic reasons, and that it was a first in car body construction.  

Can someone shed some light on what I may have missed or misinterpreted ?

 

Ah! Obscure Pennsy electric motors! One of my favorite subjects!

      The R1 (4-8-4) was a prototype passenger motor designed concurrently with the prototype GG1. It was not chosen for continued production.

      The DD2 (4-4-0+0-4-4) was a prototype freight motor designed in the late 30's for the projected, but never built, Pittsburgh extension of the electrification. It too was not duplicated.

CNJ 3676 posted:

Dan:

The locomotive in the picture you posted is the DD2 which had a welded carbody. Here's the R1:

Bob

 

Well, that explains that then.  Thanks.

A bit more searching brought this kid bit to light.  One wonders why GG1s were not considered for the electrification extension project to Pittsburgh.

"The Pennsylvania Railroad's class DD2 electric locomotive was a single prototype locomotive never placed into series production.[3] It was intended as an improved and simplified GG1 for use on the planned, but never built, extension of the PRR's electrification west of Harrisburg, Pennsylvania.[1] The one locomotive produced was numbered #5800 and used in regular Baltimore tunnel helper service until it was scrapped in September 1962.[2]

Design, construction and testing
On May 21, 1937, a meeting was held in Philadelphia to outline the design of a new electric freight locomotive. The meeting was attended by the PRR and Baldwin, as well as electrical suppliers General Electric and Westinghouse, and the transportation engineering firm , who were consultants on the proposal to extend electrification to Pittsburgh. The locomotive being designed was what became the DD2.[4]

Technical details
Although the design specified either passenger gearing or freight gearing, the prototype was only ever used with freight gearing. Its wheel arrangement was 4-4-0+0-4-4 in the Whyte notation, or 2-B+B-2 in the AAR's system.

It had two frames, hinged together in the middle, with the driving wheels and motors mounted directly to each frame, two pairs per side. A swinging four-wheeled, unpowered truck was mounted at the outer end of each frame. The bodywork, mounted above, swivelled on mounts on each of the two main frames. This was an identical layout to the better-known GG1 electric locomotives, but with four driven axles instead of six. Each driven wheel had two electric motors, each rated at 625 hp (466 kW), giving a total rating of 5,000 hp (3,700 kW) for the locomotive.

Although it had fewer driven wheels than the GG1, the total power output was slightly greater, thanks to newer and more powerful motors. Weight on the driven wheels was approximately 286,000 lb (130,000 kg).,[5] compared to the GG1's 300,000 lb (140,000 kg), meaning that in similar conditions of adhesion the GG1 was slightly at an advantage in terms of applying power to the rail, but the difference was not great. Styling was also similar to the GG1's."

References
Pennsylvania Railroad Technical and Historical Society (August 2004). "PRR Chronology 1938" (PDF). Retrieved 2008-08-27.
Pennsylvania Railroad Technical and Historical Society (June 2004). "PRR Chronology 1962" (PDF). Retrieved 2008-08-27.
Staufer, Alvin (1962). Pennsy Power. Staufer. p. 298. LOC 62-20878.
Pennsylvania Railroad Technical and Historical Society (August 2004). "PRR Chronology 1937" (PDF). Retrieved 2008-08-27.
Pennsylvania Railroad. "DD2". PRR Locomotive Diagrams. Retrieved 2006-01-05. (simple drawing and specifications, for general reference by railroad staff).

Dan,

On the assumption your interest is the PRR, I suggest you invest in a copy of the late Al Staufer's "Pennsy Power III". Most everything PRR is covered, and there are a wealth of pictures. The book is about 1 1/2" thick. Al used to set up at York, not sure if his son continues the practice.

Simon

Dan Padova posted:

A bit more searching brought this kid bit to light.  One wonders why GG1s were not considered for the electrification extension project to Pittsburgh.

"The Pennsylvania Railroad's class DD2 electric locomotive was a single prototype locomotive never placed into series production.[3] It was intended as an improved and simplified GG1 for use on the planned, but never built, extension of the PRR's electrification west of Harrisburg, Pennsylvania.[1] The one locomotive produced was numbered #5800 and used in regular Baltimore tunnel helper service until it was scrapped in September 1962.[

 

I took a number of photos of 5800 in Baltimore. It was, as the above states, used as a freight helper through B&P tunnel which was just west of the passenger station. As Mr. Padova's earlier photo shows, it looked like a slightly shorter GG1 with no stripes, different lettering placement, grilles,etc.

Between runs it was kept on one of the tracks heading up the Northern Central.