"what was the 3" extension for in the first place? Any ideas??"
For those who missed this - it is a enquiry about the exhaust on a 44. The reason for the extension was cosmetic - early 44s got a lot of exhaust debris sticking to the rear panel by the tailpipe.
The extension reduced this by putting the outlet further away from the low pressure area.
But there MAY have been another reason - changing the exhaust frequency because there had been cracking in some early Raven II exhaust systems.
Last edited by JimBall; 22nd Jun 2008 at 20:05.