Davepar
Well Known Member
The Hartzell props have various RPM restrictions, depending on the engine used. For example (this list is combined from various prop models):
1) Continuous operation is prohibited above 22" manifold pressure between 2050 and 2200 RPM
2) Do not operate above 22" manifold pressure below 2350 RPM.
3) Operation above 2600 RPM is limited to takeoff. As soon as practical after takeoff the RPM should be reduced to 2600 RPM or less.
4) Maximum engine RPM must be limited to 2650 RPM.
5) Avoid continuous operations between 2000 and 2250 rpm.
6) Stabilized operation is prohibited above 25" manifold pressure between 2300 and 2550 RPM and below 15" manifold pressure above 2600 RPM.
Being a low-time pilot and having never flown a constant speed prop, I don't know the severity of these restrictions. Are they just annoying? Do they seriously hamper cruise or take-off or aerobatics?
Thanks in advance,
Dave
1) Continuous operation is prohibited above 22" manifold pressure between 2050 and 2200 RPM
2) Do not operate above 22" manifold pressure below 2350 RPM.
3) Operation above 2600 RPM is limited to takeoff. As soon as practical after takeoff the RPM should be reduced to 2600 RPM or less.
4) Maximum engine RPM must be limited to 2650 RPM.
5) Avoid continuous operations between 2000 and 2250 rpm.
6) Stabilized operation is prohibited above 25" manifold pressure between 2300 and 2550 RPM and below 15" manifold pressure above 2600 RPM.
Being a low-time pilot and having never flown a constant speed prop, I don't know the severity of these restrictions. Are they just annoying? Do they seriously hamper cruise or take-off or aerobatics?
Thanks in advance,
Dave