Can't believe no one is serious about this great flying original Bridi kit...nothing like the sound and smell of glow fuel engines and in the case of it getting too far out you can listen if its getting further or closer (quieter or louder), the sound has saved my aircraft on a extremely windy day when I flew my first Bi-plane at AVTW , if you don't learn to fly in the wind there you'll almost never fly! Power and some weight help in windy conditions and with glow engines you can hear the other aircraft easily when other planes are flying as well.