What degree crossover is needed to cross one of two parallel tracks from an O72 switch?

Since you are using tubular FasTrack with the appropriate transition piecs should do what you want.  The crossing is 22°.

Jan

Good Luck, Mike

  Thanks Jan!  It appears 22.5 degrees is the appropriate angle...is Atlas, or even k-line’s O tubular track crossover an option?  I’ve seen both on eBay, and haven’t heard many good things about fastrack quality.  

Thanks again...

Tom

I can attest to the K line super snap/shadow rail crossings being fine for tubular trackage.  I don’t know if it comes in a 22.5 though.   You can always adapt a Ross one in too

K-Line only has90-, 60-, 45-, and 30-degree crossovers per http://www.legacykline.com/apps/kl/kline_ui.html

Jan

@FlyPlanes-PlayTrains posted:

  Thanks Jan!  It appears 22.5 degrees is the appropriate angle...is Atlas, or even k-line’s O tubular track crossover an option?  I’ve seen both on eBay, and haven’t heard many good things about fastrack quality. 

I think the negative comments about Fastrack are more than a bit overdone.  Fastrack is fine, the biggest complaint I have is it's noisy with the echo chamber plastic base.   You could just adapt a Fastrack 22.5 degree crossover to your tubular track if that floats your boat.  Carefully remove the rails and take the pins out, put the rails back on the plastic base and use standard O-gauge tubular pins.

 Not sure if this is applicable, but when I added an eye level nostalgic 15' X 40'  3 rail point to point mainline to my 2 rail scale RR,  I used wide 0144"  3 rail curves, however due to inadequate space I still needed 036 and 042 sections for the two return loops. 

You mention a lack of affection for small curves,  on my 3 rail RR, 180 degrees of the tight return loops will be enclosed inside of mountains.   No visible tight curves.

O-72 normally has 16 curve pieces to a circle. A complete circle is 360 degrees of rotation. An O-72 switch has one piece of curve track built into it.   So the crossing needed would be 360/16=22.5 degrees.