ORIGINAL: MTK

What is less clear is where to place the TVC for the vertical stab. The standard single prop drives worked well with a TVC in yaw of around 0.8. The contra seems to require a TVC in yaw of well over 1. The easiest way to get that is with additional vertical area on the main fin, keeping all else the same. Fin shape also plays a role I believe: less chord and greater span,while increasing areaby 15% at least