Rough conventional, smooth conventional, and laminar-flow or low- drag sections were tested. The items covered are rotor thrust for fixed power in hovering, range and endurance at cruising speed, and power required at high- forward speed. Calculations indicated that a smooth conventional section gives marked performance gains. Smaller gains are obtainable by using a low-drag section. At high speeds or loads the low-drag section is inferior to the smooth conventional section.
Effect on Helicopter Performance of Modfiications in Profile-Drag Characteristics of Rotor-Blade Airfoil Sections
1944
50 pages
Report
No indication
English
Engineering Index Backfile | 1944
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