So you're saying "loud pipes save lives" ? j/k, don't wanna get all the Harley riders pissed at me. I know what you mean though; when I'm flying an electric, I have a much harder time handling my plane if I can't hear what it's doing. We had a hearing-impaired young man in our club last year; I was impressed with his ability to cope with multiple flyers in the air. Just what he was used to though...