RE: Feei Bao F22 Raptor advise Please
Our tailpipe was recessed in so that the stainless steel was not visible from the outside. This was pretty much dictated by the postion of the engine plus the required air gap between the exhaust and the belmouth. I had to build a support frame to attach the pipe mounts to.
As mentioned previously, we never had problems with the rudders. Knowing about this problem as it was being built, I couldn't find anything that I could do to reinforce the mounting structure, so left it as it came from the factory...just made sure the bolts were good and tight and used a healthy dose of Locktite. I also used much stronger aftermarket linkages and metal servo arms to ensure there was zero slop in the rudders themselves...
Unfortunately, it succumbed to an inverted spin out of the top of a "power loop" and was very heavily damaged. It will be replaced!