Bastien
Well Known Member
Hi,
I am looking for some input from the engine gurus out there. In an other thread, I mentioned my participation to a contest in which I will not be allowed to exceed 120kts.
Thus I am thinking of doing this trying to have the lower fuel consumption I can have.
The settings I am currently using for training is 14.6"/2400RPM 20°LOP resulting in a 4.25GPH fuel burn.
I think I can get even better reducing my RPM but can't get any info on how far I can go. I read about the over squaring rule ( do not set over RPM/100+4 for MAP). In my case, it would mean that running at 1100RPM is still fine...
Not sure this rule apply at low power setting.
I think decreasing below 1800RPM is not useful.
What are your thoughts about that ? I would also prefer to run the engine in safe way as I will fly approx 20 to 30hours with these settings.
Note : Engine IO-375M1S, dual LSE, all the cylinders are peaking within 5F.
I am looking for some input from the engine gurus out there. In an other thread, I mentioned my participation to a contest in which I will not be allowed to exceed 120kts.
Thus I am thinking of doing this trying to have the lower fuel consumption I can have.
The settings I am currently using for training is 14.6"/2400RPM 20°LOP resulting in a 4.25GPH fuel burn.
I think I can get even better reducing my RPM but can't get any info on how far I can go. I read about the over squaring rule ( do not set over RPM/100+4 for MAP). In my case, it would mean that running at 1100RPM is still fine...
Not sure this rule apply at low power setting.
I think decreasing below 1800RPM is not useful.
What are your thoughts about that ? I would also prefer to run the engine in safe way as I will fly approx 20 to 30hours with these settings.
Note : Engine IO-375M1S, dual LSE, all the cylinders are peaking within 5F.
Last edited: