I found it

<h1>First Flight of a Bentley BR2 Rotary Engine</h1>
The problem was that there were two underlines in that first url


http://www.youtube.com/watch?v=dSYp1jFz6_E

An excellent video. Been to that field many times and know pilot Mac Hodges very well. He is the guy with the ball cap, brown jacket, kaki pants and white shoes. He's the guy with the B-29

That engine certainly is nice running.