Of all the people I know in modeling, I don't personally know anyone who runs without a muffler except the turbine guys and they fly only at airshows and in BFE. The clubs I belong to are very good to enforce this. On the other hand the real noise that can't be controlled is the prop noise and I really don't think anything can be done about that. I have several electrics and one of them (an A10 with twin 4x4 props) is louder than a .25 size swinging a 9x6 prop when fully spooled up. I have a sailplane, when on final, that the air whizzes over the wings quite loudly.

So now it's out, I'm a noise maker. What can I do about those inherent noises? I know I'll just give up the hobby, sit in my quiet home, watching TV, with a beer in my hand, or better yet go down to the local peeler bar with my new buddies. Either way I'm doing something worthless and everyone is happy because I'm not making any noise. And the community will be even more happy because I'll be giving some poor stripper the money to go to college. The epitome of LIBERAL HYSTERIA folks........