Wiktionary
drawing boards
n. (plural of drawing board English)
Usage examples of "drawing boards".
At a fairly leisurely pace, since they'd been planning on war a decade hence, but they had some first-rate designs on their drawing boards.
Indeed, he was probably the largest single reason that rationalized versions of the jeune ecole's proposals were beginning to come off the drawing boards as useable hardware.
Half of the second floor was an engineering design shop, with dozens of drawing boards complete with parallel bars instead of the old T-squares, and even one of the new drafting machines that I'd heard about.