HO scale 2-10-2 information needed

[NW Modeling List]

What ho Kenneth

Yes you are right. I was very tired when I wrote that. The crank, fitted to the eccentric on the driving wheels, is half the throw of the length of the piston stroke( or travel).

Best wishes

Barry



> Date: Thu, 16 Apr 2009 11:09:24 -0400

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

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

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

> 

> Ed,

> 

> I'm sure you meant 16", right?  According to a response over on the 

> Southern list, the Spectrum throw is a scale 13.5"  It seems rather 

> common to me to see reduced stroke in models - possible to deal with 

> over-sized crossheads and other related parts?

> 

> Barry,

> 

> Are you sure about the valve gear thing?  I suppose it would make sense 

> for something like a Joy VG, but most gears had their own eccentric, 

> separate from the crank pin.  The crank throw is important (for my 

> purpose at the moment, at least) because it determines the piston stroke.

> 

> Kenneth Rickman

> 

> NW Modeling List wrote:

> > Measure from the center of the driver axle to the center of the crankpin 

> > screw.  For either of those 2-10-2s that should be (measured with a 

> > scale rule) 32 inches.

> > 

> > EdKing

> 

> and

> NW Modeling List wrote:

>  > 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

> 

> 

> -- 

> 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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