Continued improvements in lipo and brushless motor technologies are letting EDFs get even smaller . These four little EDFS weight between 10.1 and 11.5 ounces and are powered by a 50mm sized fan. The 150 watt 3S power system is fed by a 3S 20C 850mAh lipoly battery. Speeds are in the 50 MPH range. These are the first four of a rumored twenty 50mm EDF ARFs to come. We had a great time flying ours in a schoolyard yesterday.