There is hope for you guys that want nitro sound out of your electric. These guys are putting speaker systems in their electric airplanes and dubbing in actual sound from the real plane. The sound is in sync with the throttle as well.
You may think it sounds lame now but watch the video, pretty cool!
http://media.putfile.com/Sound-equip...-P-47-Flight-1
http://video.google.com/videoplay?do...1920&q=Corsair