Mr. Zapruder has stated that his camera was fully wound. Most of the others have stated their cameras were fully wound, so we were able to more or less eliminate the very slow time that occurs when the cameras are approximately run down, and all of these things were taken into consideration and were averaged.
The Zapruder camera was found to run at an average speed of 18.3 frames per second.
The Nix and Muchmore cameras were both found around 18.5 frames per second.
Mr. Specter. Were you able to ascertain the speed of the Presidential limousine at the time of the assassination?
Mr. Shaneyfelt. Yes; because we were able to determine the speed of the camera, and thereby accurately determine the length of time it takes for a specific number of frames to run through the camera at this 18.3 frames per second, and having located these frame positions in the street, we took the farthest distance point we had in the Zapruder film which was frame 161 through frame 313.
This was found to run elapsed time from the film standpoint which runs at 18.3 frames a second, runs for a total of 8.3 seconds.
This distance is 136.1 feet, and this can be calculated then to 11.2 miles per hour.
Mr. Specter. Is that a constant average speed or does that speed reflect any variations in the movement of the car?
Mr. Shaneyfelt. That is the overall average from 161 to 313. It does not mean that it was traveling constantly at 11.2, because it was more than likely going faster in some areas and slightly slower in some areas. It is only an average speed over the entire run.
Mr. Dulles. Over the entire run between what points?