Drafting Machines is one of the Technologies in Frostpunk. It is necessary to unlock the third tier of technologies.
The Drafting Machines technology is the second of 5 special technologies which do not unlock anything directly related to the game world, but instead allow the researching of other technologies by expanding the Workshops' capacity to research. The technology following Drafting Machines is Mechanical Calculators. The prerequisite to researching Drafting Machines is Drawing Boards, having any workshops with working engineers, and 75 Wood and 25 Steel.
The regular technologies unlocked by Drafting Machines are, by technology tab:
: exclusive to The Arks
: exclusive to The Last Autumn
: exclusive to The Fall of Winterhome
: not available in Endless mode
: not available in The Arks