Parluhutan, Y. M., Ulwani, F., & Rhakasywi, D. (2025). Investigating the Impact of Plain Flap as Lift Enhancement on Symmetrical Airfoils. nternational ournal of arine ngineering nnovation and esearch, 9(1), 97–104. https://doi.org/10.12962/j25481479.v9i1.5050