The Greased Lighting or GL-10 is a good concept and test unmanned aerial vehicle (UAV) that has been made by NASA research Team in Hampton, Virginia which leads by Bill Fredericks, an aerospace engineer. The GL-10 was a prototype that planned to develop a 20-foot wingspan (6.1 meters) aircraft with diesel/electric engines, but the team built with smaller designs that started with five-pound foam models, 25-pound (11.3 kilograms), and lastly 55-pound (24.9 kilograms) as the aerospace engineer David North made the test with the team. He stated that each prototype has “hard landings” while made the flying test that lead technical answers for configuring the flight system.
In the early spring, the team made the flying test and it was succeded from hover to wing-borne flight as the first goal. The second goal, the efficient flying for GL-10 is important. Zack Johns is the GL-10’s main pilot. “He says flying the ten-engine aircraft has its ups and downs, but it really flies more like a three-engine plane from a control perspective.” “All four engines on the left wing are given the same command,” said Johns. “The four engines on the right wing also work in concert. Then the two on the tail receive the same command.” The ability to takes off and landing is quiter than a neighbor cut the grass with a gas-powered motor.
Here is the video demonstration I found =