The engineering character can design war machines, ships of sea, hang gliders, bridges, aqueducts, dams, and tunnels. Any large-scale project can be planned and designed by an engineer. If the character also has blacksmithing, masonry, or carpentry, he or she can also make repairs to an engineering project. Finally, this skill is useful in creating and repairing Constructs.
Critical Success: the project has double the service life and only incurs half normal maintenance costs.
Critical Fumble: The project works well for 1d4 years, and then has a 5% per year (cumulative) chance of failing, often catastrophically, when used.