I've been using it on my 170 for about three months now, really good prop, 7,700 to 7,800 on Coolpower 30% heli. Good torque on the up line, and nice break on the down line.

However, mine is re-pitched to 11.8, that's what Naruke is doing. If you just use the regular 11 pitch, it's not enough prop for the 170.

Adrian