RE: P-tip Props
They can be louder than others. Its odd, my DA turned the 27x10 at 6300 on the ground and its fairly loud in the air full throttle. Put the prop on my friends 106 on a H9 sukhoi, it tached 6000 on the ground but was quite a bit louder in the air, so who knows. If you dont have a noise issue, use one, its worth the money in my opinion.