So I'm working (or trying to work) with RRTrack tonight. The squares  are 12", the large radius sections are O72, and the smaller curves are O54. But things do not line up correctly. I verified that 16 O72 curves make a 6' circle, and the same all O72 switches or 072 Y switches. Everything makes a 6' circle with 16 pieces. So everything should be interchangable, right? Wrong! Look at the attached screen grab and someone please tell me where I went wrong.

Chris

LVHR

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Original Post

My guess is it has to be those curved switches and possibly that Y.  What track library are you using?  Some track brands use small pieces with a Y to help make the full size curve.

Try building and connecting your two outermost O-72 circles and find the right length straight piece to match up with your curved switches and Y.

Have Fun!

Ron

"I'd rather be lucky than good"

 

For goodness sake, if you "reply with quote" to my posts, remove the pictures.

Chris

I'm using the Ross library. The 072/054 curved turnout is longer than the 072 sectional curve so it is not an exact swap. You would need to custom cut the 072 curve between the 2 switches.

see below

Annotation 2020-02-26 000354

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Last edited by tr18
lehighline posted:

... 16 O72 curves make a 6' circle, and the same all O72 switches ...

 

What TR18 said. Looks as though you're laying out Ross track; if so, sixteen O72-O54 curved switches do not make a circle. Mixing O72 curves with those switches gives you the result you're seeing.

- The Other Guy

 

The Ross O72 curve components are set at 22.5° of arc, except for the through of the O72/O54 curved switch which is about 26. 6° of arc. The custom curve should be close to 18.4° of arc - cut out of the 22.5° factory curve.

Measuring a straight line end to end on the outside rail would be ~ 11.75" long, give or take a couple of tenths.

Carl

Arctic Railroad

O54 curves will also have to be custom cut if you want the inside arcs to run parallel to the outside arcs at some point.

Cheers, Dave

USAF E-9 (Ret) Aim High!

I would HIGHLY recommend against cutting those expensive switches.  Cut an O-72 section or use flex track before cutting switches.  Just my 2 cents.

"I'd rather be lucky than good"

 

For goodness sake, if you "reply with quote" to my posts, remove the pictures.

Thanks for the help! I see where I need to cut the pieces of O72 curve. The other thing that did not help is I used flex track for the straights and did not keep them straight! But this is how you learn!

Chris

LVHR

lehighline posted:

Thanks for the help! I see where I need to cut the pieces of O72 curve. The other thing that did not help is I used flex track for the straights and did not keep them straight! But this is how you learn!

Chris

LVHR

Yup. Just consider your track work to be more prototypical than the software and enjoy. 

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