All Slip Stream mechanically identical?

[elThomaso]

Hi,

- Are all the slip stream fans mechanically identical, so that I could take a higher speed slip stream and turn down the voltage so I get e.g. the 500rpm, and will I get the same noise level (very quiet!!) that is offered by the slip stream 500?
- Or are the slow turning slip streams dimensionned differently, as a result of which a turned down 1900, 1600, or 1200 will cause some e.g. scratching noises or similar, which a 500, turning at the original 500, will not cause?

So far I own one slip stream 500 and I am very happy, I can't hear a thing! I put it into my previously fanless HTPC and now have good air circulation without increasing my noise level.

For my next project (powerful yet quiet watercooling solution for a different computer) I intend to equip a radiator with fans, say 9 of them, as it's supposed to be a larger radiator.

As I learned to like the slip stream fans I can think of two options:
1. Use slip stream 1200 or higher, and use some fan control solution to make it turn at 500 as long as I don't need the full power (which will be the case over extended periods, given the size of the planned radiator...)
2. directly use slip stream 500, which would not permit higher cooling power if needed, however I would not need to use any fan control fuss.

This reflection now also depends on the questions put above, so I'd be happy about some kind of an answer!
Or a link to the answer if it has already been given - I searched but I didn't quite find it.

Thanks!

[Shinigami]

Hello elThomaso!

You have some interesting questions.

If you talk about the mechanical part that was done for the frame, blades and center hub housing, that is all the same. The difference between the models is only based on bearing/magnet side. Only th 1900 rpm version differs more significant from the others, because it has a different PCB and other components, which allows it to be sued in a range of 12 to around 3V. This would mean that you can control the fan speed from 1900 rpm down to 500 rpm. If you talk about the noise, it will most likely be there. When you reduce the operating voltage there should be some clicking or something like it, chances are...

Bottom line is that you should pick the fan close to the operating speed you plan to use it at.Please also consider that for use with a watercooling radiator, you might require some fans with higher static pressure like GentleTyphoon. It would work with Slip Streap, but this might be the optimum...

Cheers,
Shinigami