Hi @noithatchiaki,
The trick here is to draw a second, flat spiral exactly under the rising one and use the flat one for measuring the spacing.
If the cylinders are 27 diameter, then to be tangential their centres must be 27 apart, measured on the flat. So, starting from the axis of the first cylinder draw a horizontal circle with radius 27. draw the next 27 radius circle where the first cuts the flat spiral. Continue drawing circle all the way along the flat spiral.
Where each circle cuts the flat spiral, draw a vertical line to intersect the rising spiral. Mark the centre of each intersection on the rising spiral with a point.
If all the cylinders are the same height, draw the initial cylinder and then copy it from its point to every other point. If they are different heights you will have to draw them individually.
Here’s an incomplete example:
HTH
Jeremy