vibration often comes from couple of thigs. I'll try to put them from the most likely one to the least likely one: 1. either a bad tower 2. or not so good blades (flutter might be the case, this means they have reached the theoretical rpm limit of their structural capability) 3. probably some loose bearings this is given the windwheel itself is balanced, but it looks like it since your vibration starts at some higher speeds. and if you say the blades are the same, and one turbine shows symptoms and the other one does not - please try checking the other two points - the clue might be there.
No 2. my theory is the turbulence it leaves behind, cuaseing the one behind dirty air being pulled and pushed, creating sound. 20 30 40+ mph for the next week. And 48v has so much resistance, turbulence isn't created
I know my 12v 700w istabreeze blades start vibrating in 50+ so rap a strap around to stop spinning, 48v not noisy, same blades, just different voltage
vibration often comes from couple of thigs. I'll try to put them from the most likely one to the least likely one:
1. either a bad tower
2. or not so good blades (flutter might be the case, this means they have reached the theoretical rpm limit of their structural capability)
3. probably some loose bearings
this is given the windwheel itself is balanced, but it looks like it since your vibration starts at some higher speeds.
and if you say the blades are the same, and one turbine shows symptoms and the other one does not - please try checking the other two points - the clue might be there.
No 2. my theory is the turbulence it leaves behind, cuaseing the one behind dirty air being pulled and pushed, creating sound. 20 30 40+ mph for the next week. And 48v has so much resistance, turbulence isn't created
might be