Midday is actually not the best time to do it since the shadow of the aircraft may fall within the field of view of the camera which creates a hotspot in each image.
Aside from that, your model actually looks pretty good. Are you looking at the Full Resolution OBJ file or just the web preview? Even the web preview looks pretty good. 
Yes, some of the outer areas that got less overlap are not perfect but the area that seems to be your area of interest is pretty solid.