Hi folks, I am building a Lazy Bee for flying in a residential park close to my house. I am planning on using an OS.15 but need it to be super quiet. Any tips or tricks to really quiet this little engine down? Loss of power does not really concern me as long as it still runs good. I plan to use the extended exhaust pipe and maybe a cowl? Or will an intake filter help? Maybe a different engine would be better?

Thanks,
Bill Cripe