From your image, I may want to revise. The structure being observed by the kneeling man might by one of the gear box side mounts. If first impact was made at the tracks, Right wing low, it is likely the propellor contacted first, tearing away the gearbox, mounts, and nacelle skin. I don't see a wing tip in the second image. Ribs and skin, but oriented in longitudinal, not horizontal aspect, suggesting nacelle, not wing (tip). Also, I see a robust, cast object that has a circular attach point showing, something I would associate with a torque link, amidst some torn skin. We might be looking at the ring that constitutes the forward (circular) frame, mounting the gear box/propellor assembly. With its mass, though, and energy, how could it have remained in the area it first struck at 150 knots?
The holes in the skin (in the second image) have a square shape, and are likely inspection panels, something I would associate with an engine bay/gearbox.
Last edited by Concours77; 27th Nov 2017 at 23:24.