Rolls-Royce’s ACCEL program and a consortium of partners want to create the world’s fastest electric airplane. The concept has a recent series of predecessors, and a fascinating tie to an American speed champion. About five years ago, something called the TEACO (The Electric Aircraft Company) Bat, a formula 1-type raceplane powered by an electric motor, generated a great deal of interest. It initially housed a single 80-horsepower electric motor, but once affiliated with Williams Engineering; the project added a twin-motor unit on a set of sleeved parallel shafts swinging contra-rotating propellers. Now, a partnership led by Rolls-Royce seems to have added a third motor, with all three singing in unison to drive a three-bladed propeller. The airframe is new, too, comprising a shape that looks a great deal like the U. S racing champion, Nemesis NXT. Powered by a Lycoming IO-540 engine that airplane set a world speed record of 397.40 mph at the Moriarty Airport in Moriarty, New Mexico …