HENNIKER, N.H. (AP) — A New Hampshire company is working to develop a fleet of autonomous helicopters that it hopes can be used to put out fires, spray crops and handle other dangerous jobs. Rotor Technologies has built two of the autonomous helicopters, started running test flights and plans a demonstration of the helicopter at an agriculture trade show in Texas on Wednesday. The company is hoping to sell as many as 20 of the small helicopters next year, most of which would be used by farmers to spray fields with pesticides and fertilizers. To allow those flights, the company is counting on getting Federal Aviation Administration approval by next year.… Continue Reading