E-2a repowering suggestions needed

Mon May 3 14:16:14 EDT 2021

According to NWSL, they have no repowering kit that includes gearbox, couplings and motor but are willing to piece together something for me.  I would, as a minimum, replace the open frame motor and rubber tubing with their parts.  I’m not eager to replace the fabricated factory worm/gearbox because that requires pulling a driver, replacing the gear and requartering, which often doesn’t align with the other drivers.  I’m more inclined to disassemble, degrease and chemically blacken the brass parts, then reassemble with new NWSL parts.  My goal is a smooth mechanism that draws minimal amps for DCC installation.  Since the engine will require new headlight, class lights and stack (its diameter is too small), then DCC installed and painted, it’ll have to be completely disassembled anyway but I want to avoid messing with the drivers if possible.

I’ll be modeling 578 as it appeared in Summer 1958 when it ran with an auxiliary tender and 4 cars on the Norton branch.  I thought about doing 563 but don’t want to tackle relocating the running boards.

Jim King

 <http://smokymountainmodelworks.com/> http://smokymountainmodelworks.com/

From: NW Modeling List <nw-modeling-list at nwhs.org> 
Sent: Sunday, May 2, 2021 7:55 PM
To: NW Modeling List <nw-modeling-list at nwhs.org>
Subject: Re: E-2a repowering suggestions needed

As Matt mentioned.   40:1 gearing with the SF-266-SA motor will result in 35-40 mph at 12V, 55-60 mph at 18V.  This is a good speed range for an E2a after WWII in branch line and mixed service.  For earlier times (before the E3 locomotives came from the PRR) a bit higher speed would be desirable. 

Nigel 

On Sat, May 1, 2021, 8:20 PM NW Modeling List via NW-Modeling-List <nw-modeling-list at nwhs.org <mailto:nw-modeling-list at nwhs.org> > wrote:

Thanks for offering to look at what detail parts you used, Rick. My E will go into freight service - I have two photos indicating it was in that service in what appears to be the early forties. 

Regarding the 40:1 gearbox, the commentary about it being too low was in the context of the low rpm motors they were suggesting. 

Matt Goodman

Columbus, Ohio

Sent from my mobile

On May 1, 2021, at 5:16 PM, NW Modeling List <nw-modeling-list at nwhs.org <mailto:nw-modeling-list at nwhs.org> > wrote:

I would be reluctant about replacing the 40:1 gearbox.  The larger axle gear ratio should pair well with a replacement can motor.  If there is a problem with the existing gear box, I would recommend a 36:1 idler gearbox.  If you retain the 40:1 gearbox the fact that it is not an idler gearbox should be of no consequence.  I own an E2a from NWSL's 1971 run, which they called a 1940's version.  As for detailing, I suggest replacing the headlight and bracket and classification lights.  The rest of the castings on the model are pretty decent.  I'll look for what parts I used.  I have another E2a in the works which will become number 544.

--Rick Morrison

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From: NW Modeling List <mailto:nw-modeling-list at nwhs.org>  

To: nw-modeling-list at nwhs.org <mailto:nw-modeling-list at nwhs.org>  

Sent: Thursday, April 29, 2021 4:16 PM

Subject: E-2a repowering suggestions needed

I just purchased a NWSL E-2a that I plan to remotor, replace the gearbox and rubber sleeve, add lights, change some details to better quality, and install DCC and sound.  It will be detailed to match #578 in 1957, its last year of operation.  Looking for suggestions from anyone who’s done this.  

1.	What NWSL motor/gearbox/drive shaft numbers should I purchase?

2.	A speaker will be installed as close to the stack as possible.  Suggestions for speaker source, etc?  Not sure I’d put a low bass speaker in the tender but if y’all suggest such, I’ll consider it.

3.	If there is room in the cab after remotoring, I’d like to install a generic backhead sheet.  Anything come to mind?

4.	I was debating installing a battery system using CVP’s throttle since there’s plenty of room in the tender.  However, given that about half of my fleet is diesel with cramped shell cavities, I’ll stick to traditional DCC (NCE is what I have).  Which sound decoder is the best match for the J-whistle used on #578?

Jim King

http://smokymountainmodelworks.com/

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