Hi guys,
I'm planning a Lego diorama with a mountain range. Within one of the mountains I plan to place a lego train spiral. Heights and height differences make train mocs just pop. Do you have examples of how to build a train spiral anchored to base plates (imagine 4 48x48 plates)?
To my amazement I couldn't find a single example on google images: Noone builds train spirals on base plates. All spirals fall into three categories:
1) The tracks are on a nonlego structure, mostly wooden supports.
2) The tracks are on a lego structure, but that structure is not on studs, but flat ground.
3) And the third one is this crazy outlier that uses Lego bending: http://www.nalug.org/TrainShow2006/Spiral/spiral01bm.jpg
And when I entertained the idea, I came across a possible problem. If you change a circle to a spiral but you only have the same length, you change the diameter/radius. Does this change the layout or puts the entire structure under so much stress, that it's simply problematic to set up?
Calculation:
Imagine a classic circle based on curved tracks. You have a radius of 40 studs/32cm or a diameter of 80 studs/64cm. If you abstract it as a string you can imagine it as a flat circle or with an incline. This leads to two states:
Flat track:Circumference 201 cm
Spiral:Height (12 bricks equal) 11,52 cm, Imagine unwrapping it while keeping the incline. Then you are left with an easy pythagorean theorem with a hypothenuse of 201 cm. This leads to a circumference 200,67 cm.
This leads to a difference of 1,08 mm (1 stud equals 8 mm) in diameter. This leads to some stress I might want to mitigate by not anchoring the entire structure, but not to changing the layout (going down a stud in diameter or something along those lines.
Hope you can help, greetings Afolomus