Aircraft Design Considerations to Meet One Engine Inoperative (OEI) Safety Requirements

Figure 1. Heliport vertical takeoff profile. 2 Figure 2. Vertical procedure total drop down from CDP vs. PDR. 3 Figure 3. Horsepower required ratio vs. speed and disk loading. 3 Figure 4. PDR vs. AI at 15-foot total drop down. 4 Figure 5. OEI/TRP vs. engine number and hover power ratio. 5 Figure 6. Hover power ratio vs. disk loading and L/D. 6