Actually I think the person that wrote that misunderstood the description. I seem to remember seeing that jet on this forum and I believe it's running an EDF40 and 12mm brushless. 12 mm is about 1/2", so he probably told the writer that he was running a 1/2" dia. brushless motor and the writer mistakenly thought it was a 1/2" fan. A 1/2" fan would be cool, but it would be far too small to fly that F-16 shown in the pics.