Thank you Vapor for your reply.
Can you give me some examples of "counter rotating fans, as I have not seen this in a PC application?
It has been used in propellor aircraft, such as the old "fairey Gannet"
Are you describing a situation like:
Fan 1 rotates clockwise and pushes air in direction A.
Fan 2 rotates anticlockwise and pushes air in the same direction as fan 1.
When you put Fan 2 in front of Fan 1, the blades spin in opposite directions, but the air flow is in the same direction.
This leads on the the next questions:
As all these fans are DC voltage, can you simply reverse the (wires) voltage and turn them around to achieve the counter rotating effect that you describe?
As the "pushing" surface would now be the back of the blade, the shape of the blade would have a big impact on the performance / suitability. That is, a strait, flat blade would be the most suitable for this type of modification.
In the group of fans that you tested, which ones use a strait blade or in your opinion, would be suitable for the reversing modification?
The other question follows on. These fans are originally designed to rotate in one direction. What adverse effect on lubrication / life cycle would this modification create?
If Fan A is on one side of the radiator and Fan B is on the other, can you explain why it would be advantageous to have Fan B counter rotating to Fan A?
Thank you for your informed response.
Regards,
David
Bookmarks