HO scale 2-10-2 information needed

[NW Modeling List]

Marty

The throw of the crank pin would be the distance from the centre of the axle to the centre of the crank pin hole. In a loco valve gear it is related to the movement of the valves in the steam chest above the pistons. Roughly, longer throw = greater movement of valves.

That's how it works in the UK anyway(!)

Barry Reeves


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

> Subject: Re: HO scale 2-10-2 information needed

> Date: Wed, 15 Apr 2009 21:38:56 -0400

> From: nw-modeling-list at nwhs.org

> 

> I have access to both a Spectrum and IHC 2-10-2 (and a Proto 2000 as well), 

> and should be able to take a look at them Friday or Saturday.  I do have one 

> question: How do I determine the throw of the crank pin?  I model steam, but 

> will admit to being a layman with regards to some of the terminology.  The 

> driver diamater, powered axle, and driver spokes should be no problem.  Do 

> you prefer an answer through this list, or direct to your email address?

> 

> Marty Flick

> 

> ----- Original Message ----- 

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

> To: "Southern Consolidations List" <SRRCONSOLIDATION at yahoogroups.com>; 

> "Southern Modelers List" <SOUTHERNmodeler at yahoogroups.com>; "NW Modeling 

> List" <nw-modeling-list at nwhs.org>

> Sent: Tuesday, April 14, 2009 9:17 AM

> Subject: HO scale 2-10-2 information needed

> 

> 

> > Hi folks,

> >

> > Is there anyone out there who owns an HO scale 2-10-20 model manufactured 

> > by either Bachmann (Spectrum) or IHC (Premier)?  If so, I would like to 

> > find out a few things about them.

> >

> > First, what is the driver diameter?  As far as I can tell, it should scale 

> > out to 57", but that's based on one article about Southern ry. versions of 

> > the USRA model, and even then, manufacturers have a habit of tinkering 

> > with things like driver diameter.

> >

> > While on the subject of drivers, what is the throw of the crank pin, how 

> > many spokes are there, and does the main driver have spokes like the rest 

> > (it looked different in a badly enlarged photo I saw, at least on the 

> > Bachmann model)?

> >

> > Which axle is powered on each model?  My first assumption would be #5 in 

> > both, but I can also make the case for #3.

> >

> > My reason for asking is that, if the drivers are indeed 57", it may be 

> > practical to remove the rear driver to make a Southern consolidation, or 

> > do a little more rebuilding to make an N&W class M.

> >

> > Thanks in advance.

> > Kenneth Rickman

> > -- 

> > Kenneth Rickman - krickman1 at carolina.rr.com

> > Salisbury, NC

> >

> > "Once admit that human life can be guided by reason, and all possibility 

> > of life is annihilated" - Leo Tolstoy

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> 

> 

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