Sikorsky Innovations, the technology development arm of Sikorsky Aircraft, revealed last week at the Farnborough International Air show and this week at AirVenture 2010, the Firefly™ Technology Demonstration Aircraft, the first all-electric helicopter. Based on an S-300C, the electrified version replaces the original Lycoming drive train with a U.S. Hybrid power package consisting of a 200 horsepower electric motor, motor controller, and 1,100-pound lithium- battery from Gaia. To monitor operations and “the health” of the craft, Sikorsky has installed an LCD display in the modified center console. One benefit of electrified helicopters would be the discarding of the traditional complex series of mechanical links between the main rotor power takeoff and the tail rotor. The tail rotor on Firefly can be powered by small electric motor linked to the main rotor’s speed output signal. The battery pack’s high weight will allow only 15 minutes of flight at first. “Our objectives with Project Firefly are to provide a proof of principle …