Bachman EZ Track Puzzle

[Anonymous]

I purchased the "BACHMAN DIGITAL COMMANDER" start up set. In addition to that, I got the "YOUR FIRST TRACK PACK" package. In addition to that I got an entire circle of 22" radius. What I am trying to do is build the layout demonstrated in the VIDEO included in the TRACK PACK which is basicaly an oval with an 18" in the center to form a kidney shape. That part is no problem. The part that is causing me some confusion is that I am trying to do it with a double track. I am trying to figure out the angle and or piece that I need to complete the outside track. My geometry is not so hot and I am having some trouble. It all comes together fine when I do simple ovals, I just add the 3" piece in the center of the 18" and it all fits nicely. It is when I try and make that kidney shape by adding the one section of curve in the middle that the problems begin. What size and or curve pieces do i need to complete this puzzle?

 Hope this makes sense.

 TIA for any assistance

[Jake1210]

The problem is that you can't make the same kidney shaped track with the 22" radius curves. Try this, make a 90 degree turn out of 18" and 22" track, it should take 3 sections for the 18" and 4 for the 22". Which means the angles aren't the same. The 22" radius curves have a curvature of 22.5 degrees per piece. The 18" radius curves have a curvature of 30 degrees per piece. The angles aren't equal. Not to mention, on the inside curve of the kidney shape (I know exactly what the layout you speak of looks like) you would need a curve with a radius smaller than 18". 16" At least. Which, isn't good. I'd have to advise that you stick with the original plan detailed in the video.