Originally Posted by
frank edwards
The K80G that Howard is referring to was tested, I tested the turbine with the ECU that it came with and the Max RPM is set to 141K it will not go any higher, you can lower it but it will not go any higher......When I ran the K80 the GSU showed a max of 141200. The next test I took Howard's ECU that came with his new K80G. The new ECU under settings, maxes out at 145K. I fire the engine up and there was a significant difference in thrust. The GSU showed a max rpm of 45700. The third test was I took the new ECU, dialed it down to 141K then test ran it and the Max rpm showed 141300. So in conclusion the original ECU was PROGRAMED WRONG. There's nothing wrong with the turbine it's the ECU so no one is casting Stones here...... When I call Berry to try to get the ECU reprogram, he told me it's set for safety reasons at 141K. If that is the case that turbine should never been sold as a 19 pound class turbine because it's only putting out 17 pounds of thrust therefore it's no good to meet for the aircraft that I purchased it for.
Frank,
The engines them self will operate at what ever the ECU tells it to. So using the newer ECU set at 145K will let the older engine run at 145K. The question is, what is the thrust output with the older K80 at 141k RPM? Is it putting out 18-19lbs at 141K RPM or is it only 15-16LBS? I am guessing it is putting out the specified power at 141K RPM and that is why the ECU is locked down at said #. If the engine is producing 18-19lbs at 141 and you open it up to 145K RPM that engine will be producing 100N + range and it is not designed for that much power and that is probably why Barry said it is locked down for safety issues. I have a K-140 that is locked down at 120k RPM and I know it produces 31lbs 12oz per my scale but the manual says the max RPM limit is 123K RPM. If they opened up the ECU to 123K RPM it would be producing 160N power and the engine is not designed for the extra horse power and that is why it is turned down.
I think you guys are misunderstanding about the max RPM's settings. The engines exponentially produce more thrust when you get into the higher RPMs and make very little thrust in the lower RPM's. So, if the factory locked the ECU down at 141k they did it because the engine makes the thrust it is suppose to at 141K RPM. Like I mentioned earlier at 145K RPM it is probably putting out 100N + power. Are you thinking because it is not set at 145K RPM you are not getting the power you should be? I guess I will repeat myself and ask, what is the max LBS output you are getting with your scale on a test bench?
Have you called Dirk at Tech Support for his opinion?
Ghostrider