If you want to see it fly with an OS 91, just take a look at the video in my review of this thing:
http://www.rcuniverse.com/magazine/a...article_id=750
And BTW, the day I shot the video, the engine was not running right. It was close, but not 100% (Came to find out I had some bad fuel) but It was running well enough to get the video shot so I went ahead and shot it.