Washington, DC(CNN) Frustrated Tesla owners continue to wait for "full self-driving," an expensive and long-delayed software feature that isn't even guaranteed to help their cars' resale values. Some of the company's earliest backers of the "full self-driving" option are even beginning to lose faith in the promise of ever enjoying a truly autonomous Tesla. Years-long delays, buggy beta software, and the risk of no return on their investment in the option package have left some Tesla owners disappointed. Tesla CEO Elon Musk's prognostications, and Tesla's actual reality have diverged so much that some owners describe to CNN Business that they've lost confidence in his predictions. Some otherwise satisfied Tesla owners describe feeling duped into buying "full self-driving" ahead of its polished release, because Musk warned that the price would increase.

Most people have heard about self-driving cars, with companies from Google to Honda developing autonomous vehicles. But driverless technology could be going beyond cars, with the testing of a self-flying helicopter. A Sikorsky S-76 commercial helicopter has now successfully taken off and flown autonomously 30 miles, before landing itself safely. The helicopter in the trial was the Sikorsky S-76 model which used Sikorsky's MATRIX system The Sikorsky Autonomy Research Aircraft (SARA), used Sikorsky's MATRIX system. This is the same system that is use in the Optionally Piloted Black Hawk (OPBH) Demonstrator.

Most people have heard about self-driving cars, with companies from Google to Honda developing autonomous vehicles. But driverless technology could be going beyond cars, with the testing of a self-flying helicopter. A Sikorsky S-76 commercial helicopter has now successfully taken off and flown autonomously 30 miles, before landing itself safely. The helicopter in the trial was the Sikorsky S-76 model which used Sikorsky's MATRIX system The Sikorsky Autonomy Research Aircraft (SARA), used Sikorsky's MATRIX system. This is the same system that is use in the Optionally Piloted Black Hawk (OPBH) Demonstrator.

Most people have heard about self-driving cars, with companies from Google to Honda developing autonomous vehicles. But driverless technology could be going beyond cars, with the testing of a self-flying helicopter. A Sikorsky S-76 commercial helicopter has now successfully taken off and flown autonomously 30 miles, before landing itself safely. The helicopter in the trial was the Sikorsky S-76 model which used Sikorsky's MATRIX system The Sikorsky Autonomy Research Aircraft (SARA), used Sikorsky's MATRIX system. This is the same system that is use in the Optionally Piloted Black Hawk (OPBH) Demonstrator.