The Collaborative International Dictionary of English v.0.48:
Draft \Draft\, a.
1. Pertaining to, or used for, drawing or pulling (as
vehicles, loads, etc.). Same as Draught; as, a draft
2. Relating to, or characterized by, a draft, or current of
air. Same as Draught.
Note: The forms draft and draught, in the senses above-given,
are both in approved use.
Draft box, Draft engine, Draft horse, Draft net,
Draft ox, Draft tube. Same as Draught box, Draught
engine, etc. See under Draught.