If you look at fan blade spacing, you'll quickly realize the blades aren't equally spaced, and the blades are usually different sizes to keep the balance. The net result is that your fan is probably further out of balance than the factory margin of error.
But on a lightweight plastic fan it probably doesn't matter much.
If the fan blades are evenly spaced, it'll sound like a Cessna trying to take off. By using an odd spacing it breaks up the harmonics and makes the fan quieter.
But on a lightweight plastic fan it probably doesn't matter much.
If the fan blades are evenly spaced, it'll sound like a Cessna trying to take off. By using an odd spacing it breaks up the harmonics and makes the fan quieter.