So, after some work I've started to build my very first prototype VTOL aircraft. To make it as efficient as possible, and extend it's range I'm using a real airfoil (E214), two 3Ah 4s LIPO's (14.4V nominal) and in forward flight, only two engines will be running. It's actually more efficient to run two engines a bit harder then to run 4 engines lightly loaded. The overall plane will be slow in forward flight, but efficient, I'm aiming at about 60-80 kmh (37-50 mph). My design wasn't based on something from the start, but after seeing a flitetest video, it seems it looks a lot like the C-119.