The Dahak was a experimental impeller-using spacecraft privately built and owned by famed hyperphysicist Dr. Joseph Buckley. After no one was prepared to endorse his conclusions on faster-than-light travel by the use of impeller wedges, Buckley, whose patents had made him a wealthy man, designed and built the Dahak and embarked with a volunteer crew to demonstrate the validity of his work. However, the attempt was unsuccessful, and the Dahak was destroyed with all hands in a spectacular explosion. (HH12)