I am currently planning to build a glow engine rc plane. I need help with the frame design. What airfoil shape(example: NACA 2412) would suit if i need good thrust as well as suggest me a glow engine supporting the thrust required for the frame as well. I need a payload of around 4kg or less. How do i design my airfoil according to that? And i am looking for good glow engines with more thrust. So suggest me some of those too. Thanks in advance.