ORIGINAL: tp777fo
I vote for using the entire bypass. In my Avonds F-16 he specifically sez to not run the motor at high power setting without the top of the bypass to keep from collapsing the pipe. I dont want to experiment to find out if it matters. I personally think it will help the airplane with the bypass as the airflow will be cleaner through the motor vs the turbulence through the fuselage without it. I think they have lots of advantages for very little work.
I ran mine with it on and it seemed like it got really hot from the heat of the tailpipe on the turbine. Is that normal? Also, what about the gap issue? One other thing, the Skymaster bypass does not go completely over the thrust tube. It just bumps up to it. Not a perfect seal so to speak like others that wrap over the bell house.