Hi, I made a crude setup to measure prop thrust on my electric mini edge540. I used a digital scale connected to a laptop. Good accruacy. I measured 2 pounds of thrust in still air . I decided to see what would happen to the thrust value if I directed a large fan on the prop during tests. Surprising to me the thrust dropped about 10 percent. Not sure what happened to the RPM's. Fan was aimed at the prop nut at a distance of about 2 feet. I thought it might "unload" the prop and the thrust would go up. Not being a prop expert, what would you expect me to think?...... Anyone got any comments?