Hi Guys,
I need help/enlightenment about the nomenclature involved with aircraft design. To make a long story short, I am in the midst of kit bashing a 4*40 by replacing the tail feathers and ailerons with something extra parts and moving the wing to a mid fuse position. How does one figure where the thrust line is and what is the thrust line? The 4* is o degrees on stab 1/2 degree up on wing with 2 degrees dihedral and 2 degrees down thrust on the engine. The engine is setting high in the fuse and I intend to lower it to the mid point of the firewall. My questions are; how do I find the thrust line? Do I need the engine down thrust to counteract the semi-simetrical wing design and 1/2 degree positive angle of the wing. What is the result of moving the engine 1/2 inch lower in the fuse( does this effect the thrust line location)?