The Monarch B was a human-powered aircraft, designed and built by graduates and undergraduates of the Massachusetts Institute of Technology, and won the £20,000 first prize for the Kremer World Speed Competition.
[1] Modifications made included a new, redesigned, fuselage, with the pilot being seated in a recumbent position.
Changes were made to all three parts of the power systems; for the pilot, the gearing ratio of the chain drive changed; a new set of Ni-Cad cells, using a greater voltage, was installed; the propeller was modified to be variable pitch.
[2] Designated the Monarch B, to distinguish it from its predecessor, the monoplane first flew on April 4, 1984, at Hanscom Field airport in Bedford, Massachusetts, with Frank Scarabino as pilot.
On May 11, 1984, it traversed the Kremer course in an official time of 2 minutes 55 seconds, for which the MIT Monarch team were awarded the £20,000 prize.