Nope, it wasn't the firewall. I reinforced the firewall. The left wing broke completely off the airplane a fluttered down to the ground long after the rest of the airplane was buried deep in the ground. I was making a normal full power right hand turn at the time. I have had the airplane for two or three years but usually only fly it at warbird meets so it did not have all that many flights on it. Performance was very good with the G-20 engine. I had a B&B header, after market ignition using an MS 15x7 three blade prop. Also, I have been able to get in touch with Ralph. I am glad to see that he is still working on engines for us guys. He is one heck of a talented and good guy.

Best wishes and good safe flying.

Roger