We have a few questions this morning and a few from yesterday that were basically materials science questions:
Would a roof over a ship's board hinder operation of the ship significantly?
How would sails from a fireproof material affect ship's performance?
How can I make steampunk airships less flimsy?
How would rudder protection against water elementals affect ship's performance?
How would the existence of large rideable flying creatures have changed the design of castles?
These questions do not appear to be directly about world building but definately have an application in world building. But then again so does physics, math, geology etc. I am thinking we need to draw the line somewhere that is relatively easy to tell which side of the line most questions fall. But what should that line be?