Hi @ all,
a friend supported me with this to check the power of the fan on my lathe (due to the data sheet max. 4,000 revs / 1,500 Watt)
This was real impressing and the fan with 4,000 revs made my VERY uncomfortable (very windy in my workshop...)
One test run without fan and one with fan gave this results (the difference between both runs)
500 revs: 5 Watt
1,000 revs: 68 Watt
1,500 revs: 115 Watt
2,000 revs : 241 Watt
2,500 revs: 500 Watt
3,000 revs: 780 Watt
3,500 revs: 1,260 Watt
4,000 Watt: 1,755 Watt
This might be not absolutely correct because of 3 reasons:
- 1,755 Watt is more than my lathe can supply (due to the date sheet)
- on the car the fan runsnot free but behind the rad
- on speed the speed itself supports the airflow and reduces the need of power, as Pete mentioned
So finally - we are back on the crystal ball again.
And I'm pretty far in progress with part 3 of the fan project - the "half weight" fan extension.
Perhaps someone can explain how the original fan and extension was balanced at the factory?
I guess all together, with the balancing washer, than marked with that tiny drill, so possible to dismantle and put together again?
But only with THIS fan, THIS extension, THIS used balance washer, the correct side of the washer out and due to the tiny drill?