In my son's bedroom I currently have a standard five-blade ceiling fan. We are currently changing the decorating motif in his room to "airplanes". I thought it would be really cool to change the ceiling fan to look like a propeller. I have found a vintage three-blade imitation propeller that will fit on the current brackets.
The new blades will be roughly the same length and weight as the old ones, and I will mount them equally spaced (not just using three of the five original mounts), so I do not expect any issue there. So, my only concern would come from having "not factory standard".
Will it be safe to only mount the 3 blades on the 5 blade system?