This is why I'm saving up for a Moki 400 radial. Sounds like no other engine. Attached to this gorgeous scratch built P-47 Reno Racer it just looks awesome with the smoke pouring out of the exhausts. Flown at the Weston Park International Model Show and filmed in stunning UltraHD/4K resolution.
http://www.youtube.com/watch?v=ITB10wNsCTw