Arrow MP Calculator
PA-28R-201 Arrow III – Manifold Pressure for 65% Power @ 2500 RPM (Best Power Mixture)
Range: Sea Level – 9,400 ft (critical altitude)
Enter values to see ISA deviation
Required Manifold Pressure
— in. Hg
—
Note:
Reference – POH Standard-Day MP Table (65% Power, 2500 RPM)
| Pressure Altitude | ISA Temp (°C) | MP (in. Hg) |
|---|
About This Calculator
- 📋 Data is sourced from the PA-28R-201 Arrow III POH, Section 5 Power Setting Table (Lycoming IO-360-C1C6, Best Power Mixture)
- ⚙️ Fixed at 65% power and 2500 RPM, mixture set 100°F rich of peak EGT — approx. fuel flow 11.4 GPH
- 📐 MP is linearly interpolated between table altitudes, then corrected for non-standard temperature
- 🌡️ Correction: approximately 0.16 in. Hg per 10°F (5.5°C) deviation from standard temperature — added when warmer than standard, subtracted when colder
- ⚠️ 9,400 ft is the critical altitude for this power setting — above it, 65% power is not obtainable even at full throttle
- ⚠️ For training and planning reference only. Always consult official documentation before flight.
Disclaimer: This calculator is for training and planning purposes only. Always verify power settings using official aircraft documentation and the POH before flight.
