ORIGINAL: c/f
Max set throttle is showing 115K rpm.
As an SP I really expected better performance than the stock one in the KingCat..........
Got to thinking about the 115K you mentioned for the SP and it didn't sound right. I just checked my 280-SP and it is set for max RPM of 117K. As I recall, 115K was the setting for the "standard" 280. That would at least explain the apparent lack performance.
Aslo I'm using Tams included exhaust tube mated to the BVM Bypass, and now that I think about it there is no flow for air thru the double wall Iguess this is OK???
Well, there has to be air through the double walls. It's either being provided by the air bypassing (flowing around) the turbine through the "bypass" or in some installations the outer exhaust wall is not flush with the bypass and draws air through the fuselage. In any case, you need some small ram air holes or other method of providing airflow through the fuselage and around the exhaust tube as well as between the walls. For areas where the exhaust tube clearance is close to the fuselage or near servos, protect the area with Heat Shield or a piece of heat blanket.
Craig
Craig