Allegheny question

     Doug on my old layout I spaced my tracks 4 1/2 " center to center with a big boy and an Allegheny and I never had any problems with overhang hitting anything on the other line. Choo Choo Kenny

Thanks for the reply Choo Choo.  My issue is an obstruction 2 1/2 inches from the center rail on a O-72 curve.  I would have a problem changing it.

Doug, 

Be careful with those types of issues. I ran my Big Boy around each time I added anything close to the track. Every time Inthought I had enough clearance, the Big Boy had a different opinion.

The Allegheny has a shorter front deck, but is still massive. I would contact someone who has an Allegheny for the measurement.

Eliot

We had collisions with large articulated locomotives and 21 passenger cars or the Lionel auto carriers on O99 curves spaced at 4.75", so I'd have to say that 4.5" is not sufficient.  My Allegheny is packed away right now, but it had less than 1/4" less overhang than the VL-BB, and it would have had the same issue on those 4.5" spaced curves.

Thanks Eloit and John.  My issue is a tunnel portal on the outside of a curve.  

Those are especially bad, we did a number of changes to tunnels on curves so that the articulated stuff would make it through.  Judge for yourself, here's the VL-BB going through an O72 curve.

gunrunnerjohn posted:

We had collisions with large articulated locomotives and 21 passenger cars or the Lionel auto carriers on O99 curves spaced at 4.75", so I'd have to say that 4.5" is not sufficient.  My Allegheny is packed away right now, but it had less than 1/4" less overhang than the VL-BB, and it would have had the same issue on those 4.5" spaced curves.

Agree with gunnerjohn in regards to the 'bigger' engines and tack spacing.

No 21 in. cars for me.  My mallet clears by 1/4 in. From the portal.  I would like to get an allegheny but not if it won't clear.

Find someone to visit with their Allegheny, that's the only "sure" way.  It'll be close, I believe the Mallet has considerably less overhang, but I don't own one of those to check.

I open up a lionel portal to 6". I allow 3.25" from center rail entering the portal. I originally set this up for the big boy knowing everything would fit. You won't notice that the portal is not centered.

Rod Miller

If you allow for a 3" overhang from the center rail, that makes the track spacing 6" to avoid opposing collisions, about what I'd expect you'd need. 

romiller49 posted:

I open up a lionel portal to 6". I allow 3.25" from center rail entering the portal. I originally set this up for the big boy knowing everything would fit. You won't notice that the portal is not centered.

Rod Miller

Is that a Big Boy in the pic?  0-72 track?  what is the distance from the engine to the portal?

Thanks

The engine is original lionel allegheny running in 080 curve. Same with 072 . The picture shows the allegheny just going under the portal.

Rod Miller

Doug N posted:

Can someone tell me how much overhang is on the front of a scale Lionel allegheny, on an O-72 curve from the center rail.  I assume the new Lionel one will be the same as the previous version. I'm thinking of getting one when they come out but I may have a clearance problem.

 

thanks

Doug,

Here you go.  This is my JLC Allegheny on Ross O72 track.  The ruler is set against the outside rail.

For center-to-center spacing, add 3/4" to that.  That gets you to 2 1/2" overhang, figure a similar value for the other track and you have 5" minimum, best to go with 5 1/2" and allow for the Big Boy.

Thanks Ron & Allan.

Allan it looks like your overhang is 1 3/4 in. From the outside rail.  That is what I have.  That's close.   I guess I will have to think about it.

Thanks again