We actually do not have to be that quiet 84dba at 7meters are the noise limits. Sadly I was part of this noise trouble at our flying site with my engines turning @ 18000-20000rpm almost every sunday so I had to do some radical changes and I am glad I did it and as mentioned discovered the huge thrust our little engines can produce with a larger and more efficient prop.

And you know "when a neighbour complains he/she complains" and we can not ignore them or we will be forced to fly only very well muffled and quiet fourstrokes or electrics

Now the guys telling me how quiet my twostrokes engines are and the neighbours are happy again[sm=thumbs_up.gif].