rtfm
Well-Known Member
Hi,
I'm a bit confused about gear reduction units...
Let's take engine "A", for example. Max RPM = 7250, producing 100hp. At 75% power (we assume a linear power curve) it will be doing about 5500 RPM. If we assume that we are aiming for about 2800 prop RPM, we would need a reduction unit of about 1:1.95
It this right?
What if we wanted to cruise at 85% power on a fixed pitch prop? Would we need to fly at almost 3200 prop RPM?
How do in-flight adjustable (or constant-speed) props handle this?
Duncan
I'm a bit confused about gear reduction units...
Let's take engine "A", for example. Max RPM = 7250, producing 100hp. At 75% power (we assume a linear power curve) it will be doing about 5500 RPM. If we assume that we are aiming for about 2800 prop RPM, we would need a reduction unit of about 1:1.95
It this right?
What if we wanted to cruise at 85% power on a fixed pitch prop? Would we need to fly at almost 3200 prop RPM?
How do in-flight adjustable (or constant-speed) props handle this?
Duncan
