Testing Electric Propulsion: On August 19, National Aviation Day, a lot of people are reflecting on how far aviation has come in the last century. Could this be the future – a plane with many electric motors that can hover like a helicopter and fly like a plane, and that could revolutionize air travel? Engineers at NASA's Langley Research Center in Hampton, Va., are studying the concept with models such as the unmanned aerial system GL-10 Greased Lightning. The GL-10, which has a 10-foot wingspan, recently flew successfully while tethered. Free-flight tests are planned in the fall of 2014. Today, share your first flight experience with images and stories using #myfirstflight. Image Credit: NASA Langley/David C. Bowman #nasa #nationalaviationday #nasaaero #aeronautics