NACA 4418 airfoil is taken for consideration, wherein a wing has to be placed on quadcopter drone. The wing is fixed and rotors are also fixed. Such that the wing has to be placed in an angle. In that case,
- Drone in horizontal position: Forward and upward lift
- Drone in slanting position: Forward (horizontal) lift
When C_l = 0, then alpha = -4.1936deg
When C_l = 1, then alpha = +4.681deg
Question is, what alpha value do I need to consider? Other factors are under assumption (shape of the drone, rotor, etc.)
Good afternoon. It is only necessary to consider the cruising mode as for a conventional aircraft. The angles of attack for calculations are taken within approximately +18 degrees. up to -15 degrees. The remaining modes (combined), I think, do not need to be considered, because you will not get normal aerodynamic quality! It is about lifting or moving like a helicopter. In these modes, it is necessary to provide the necessary controllability and stability. Aerodynamic quality will have to be neglected. These modes are atypical and short-lived. Sincerely!
Dear Johnson Ebenezer Rajendran,
Also, I suggest you see the links and attached file on the topic.
https://irjiet.com/common_src/article_file/1618560005_5f278e390d_5_irjiet.pdf
https://core.ac.uk/download/pdf/31237731.pdf
Article Design and performance analyses of a fixed wing battery VTOL UAV
Article Aerodynamic Study of a NACA 64418 Rectangular Wing under For...
Article Performance Analysis of a H-Darrieus Wind Turbine for a Seri...
Best regards
Good day. You must have data for the entire layout; profile data itself is much higher than specific wing data (taking into account elongation and narrowing); the characteristics get worse when you adjust the wing with some central body. After all, you need an aerodynamic polar of your layout as a whole, where you will get the value of the most favorable angle of attack. Otherwise the decisions will be wrong. From practice (1 approximation) set the value of the lift coefficient of 0.5-0.6. (Example of deterioration: NASA 4418 has a maximum quality of about 85 units. The wing can have a maximum of 30-35 units, depending on its layout. And when more plumage and central body, it can be 17-19 units). There should be an aerodynamic polar of your layout. Sincerely, Matiychyk.
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