ORIGINAL: Cybertom
Luigi,
You HAVE to make a video of the SL 150 running WITH the EXHAUSE RING. In my experince the ring makes the engine run smoother and the sound is deeper especially at idle. I have got to hear it!
Here are the videos for you of 'SL150 mounted on flight BU133
Hello
http://www.youtube.com/watch?v=0baW8h6Bwxg
http://www.youtube.com/watch?v=ghku7vlhe8k