The Chronologic Vessel Anachronism, widely revered among the time-traveling subculture, is generally recognized by experts of the secretive field as the first machine capable of reliable Temporal Displacement. Though its components are/were cobbled together haphazardly, its design was/continues to be widely emulated by Temporal Venturers throughout history.
The genius behind the very idea of Temporal Displacement lies with a certain Dr. Michael Willard (born 1820), inventor of the crucial Cyclonic Deregulation, which stabilizes certain aberrations in fields of high energy density allowing a bubble of space to shift along the fourth axis, also known as time. Known as a mogul in his "home era" of the late 1800s, he puts his genius to work on eccentric projects, which are occasionally successful.
Though Dr. Willard has the vision, without master mechanic & atomic physicist Charles Henderson (born 1827), 'time-travel' technology might never be/have been realized. If the Doctor has an idea, Charlie can build a machine to make it work. He also supervises in-flight maintenance and 'time-jump' calculations on all the Doctor's Temporal Vessels.
The Anachronism's levitation capabilities beg for an exceptional helmsman, and no one is more suited than WWI Ace pilot Jeremy Clayton (born 1895) to tame them. He is a natural pilot, equally at-home behind the controls of a biplane as at the wheel of a sloop-of-war. Though the Anachronism hasn't the speed of some "new-fangled Aerojets," in the hands of Clayton its unique propulsion is more than capable of astonishing feats of aerobatics.
The vessel's airframe is driven & lofted by a pair of Encyclic Engines (visible as large discs on the vessel's flanks) - specialized forms of entropic inversion mechanism, optimized for antigravitic repulsion. They provide a strong, reliable source of power while allowing the craft to hover & move about. Forward thrust, however, is provided by a hydrodynamic turbine in the rear.
The Doctor traditionally seats himself at the bow, commanding an impressive view of far-below landscapes.
Charlie has little time for such luxury, busy readying the craft for its next leap to times unknown.
Dependable as the Encyclic Engine's reputation may be, regular care is nonetheless advised - lest one find one's ship plummeting suddenly to earth.
Though the Encyclic Engines provide ample power, it is nothing next to the voracious energy appetite of the Cyclonic Deregulator during a time-jump. Therefore, the Engines' output feeds into a massive plasma capacitor capable of channeling over 6 Gigajoules of energy into the Deregulator in 4.2 nanoseconds.
The Deregulator (Pictured atop the vat-like capacitor) then propagates a 'cyclone' ring of photons, creating an energy field dense enough to produce space-time aberrations, which can then be 'deregulated' to form the aforementioned bubble of space.
The trio of Temporal Venturers is dedicated to exploring the future for the benefit of the past - but they exercise restraint in the magnitude of their forward exploration. Too many years into the unknown future can provide some dangerous surprises: "Better to map out history a year at a time than to spend a year puzzling out what happened in the last 50," the Doctor reasons.