Engine maximum power of PXI engine is rated 1000 HP at 4000 m, so the ram effect of the air scoop leads to: - higher rated altitude of maximum speed of 1250 m (=0.073). - higher power output, about 1035 HP instead of 1000 HP
In the following diagram you can compare the power curves with (red line) and without /black line) the ram effect.
After calculating power needed and power available at different altitude, the following charts can be worked out:
Information shown on this page are approximated values obtained from available information