Can I ask the class a question (not bearing related sadly).
I recently installed a Changesun 10 blade fan into my FMS F-4 Phantom and having read through some of these posts it would seem like the lip makes a big difference to the fan's performance.
In the F-4, the air intakes funnel down to roughly the same diameter as the fan housing, therefore I can't fit the lip to the front of it. I'm assuming that in this instance having, or not having, the lip installed is going to make very little difference?
Also, I'm using a 2,660kv HET 2W-25 on 5S to drive the fan and although the combination produces a lot more thrust, I don't get the whoosh
I also have a HET 6904 5 blade fan and am thinking that if I'm not getting the desired noise it may be more efficient to switch the CS10 to the 6904?
Any help much appreciated.