Which AFM? Rev A or Original?
Posted: Tue Feb 15, 2022 7:39 pm
Hey everyone,
I am looking for help in a topic about which AFM to reference. I own a 195O Cessna 170A with the STC Continental 0300-C model. It has a McCauley 1C172EM7653 prop and my ultimate goal is to make adjustments to my electronics international CGR-30P engine monitor and more specifically my RPM indicator.
At the moment, I have a green range of 2200–2450 rpm, A cautionary range that flashes 2451-2699, and a redline of 2700 RPMs. The AFM supplement Rev A under engine instruments - Tachometer, states a normal operating range of 2200–2450 RPMs The original AFM supplement doesn’t states normal operating range and just the 2700 RPM redline. I
Like most of us, I do not have the original AFM supplement that came with the STC for the engine swap of my current engine.
What I want is the flashing yellow to be removed because I believe it to be distraction when flying at high altitudes. I understand that it’s there for a reason of, but I believe that we should use the full range of our performance envelope.
I mean if Lindbergh didn’t show how to operate at lean of peak in the P39 during WW2, those pilots would of never been in the right spot at the right time.
So, which AFM should I reference to show electronics international that this adjustment is allowed?
Thank you for your time and thoughts
I am looking for help in a topic about which AFM to reference. I own a 195O Cessna 170A with the STC Continental 0300-C model. It has a McCauley 1C172EM7653 prop and my ultimate goal is to make adjustments to my electronics international CGR-30P engine monitor and more specifically my RPM indicator.
At the moment, I have a green range of 2200–2450 rpm, A cautionary range that flashes 2451-2699, and a redline of 2700 RPMs. The AFM supplement Rev A under engine instruments - Tachometer, states a normal operating range of 2200–2450 RPMs The original AFM supplement doesn’t states normal operating range and just the 2700 RPM redline. I
Like most of us, I do not have the original AFM supplement that came with the STC for the engine swap of my current engine.
What I want is the flashing yellow to be removed because I believe it to be distraction when flying at high altitudes. I understand that it’s there for a reason of, but I believe that we should use the full range of our performance envelope.
I mean if Lindbergh didn’t show how to operate at lean of peak in the P39 during WW2, those pilots would of never been in the right spot at the right time.
So, which AFM should I reference to show electronics international that this adjustment is allowed?
Thank you for your time and thoughts