JAMES - Thanks for posting that animated visual aid. Remember that the Huge Gates were attached to the side of the TSBD. I do not believe the placard shadows are being cast onto "the wall"/"the side" of the TSBD. This is throwing off the animation measurements being posted. Those placard shadows look like they are being cast onto something stacked there. No side of the TSBD resembles what we are seeing on the Martin Film. There are dock doors on that same side of the TSBD 1st floor. Dock doors possibly being built into what we are seeing on the Martin Film? I don't think so.
Royell, to model your theory of a space between the east gate at its fully open position I modeled the effect of the space by incrementally moving the east gate westward, thus generating a variable space between the gate and the “wall”. At each increment I animated the gates rotation until it gave a shadow pattern similar to that of Martin_Euins fillm. I did this procedure for simulated space increments up to 12”.
The data shows that the larger the space the smaller amount of gate rotation is required to compare with Martin_Euins shadow patterns. Thus, the maximum rotation falls at about 14 degrees.

