Chris Davidson

The dress shirt I used for my original collar height measurement was 1.875". It appears the collar height on JFK's shirts were 1.5" tall. So, my torso height up to the collar top is 28.5" (28.875-.375"). JFK's torso(same span to collar top) was .7" longer than mine. His length is 28.5" + .7" = 29.2" His collar top to head top = 7.79" 29.2 + 7.79 = 36.99" His head top - (torso + collar top) = 52.78 - 36.99" = 15.79" from the ground.

My torso is 7" in depth from throat to back. (wife measured) 7" over a 16.6" seat depth = 42.1% coverage .421 x 2.8" = 1.18" The front of my torso is raised 1.18" higher than the backside because of the seat slope.

The back seat was 16.6" deep. It sloped from front to back approx 2.8".

Now, the frontside. To begin: I'm the same height as JFK- 72.5 " The difference between JFK and me (headtop to shirt collartop) is 7.79" - 8.5" = .71" The top button on me is 25" above my rear end sitting down. (See bullet hole location in previous document) Since JFK is .71" shorter from headtop to collartop than I am, I'll add that length to his torso. The top button on JFK is 25" + .81" = 25.71" + (had to add .1" to make it all work out) The throat shot is .875" below the button = 25.81 - .875" = 24.935" (See bullet hole location in previous document)

The top of JFK's head to the top of his shirt collar was 52.78 - 5.75- 39.24 = 7.79 inches. That's the backside info. Thanks to whomever posted this document originally.

The original elevations were measured to the ground. The final elevations were measured to the chalk mark. Mr. SHANEYFELT. That is 44 feet from station C--91.6 feet to the rifle in the window from the actual chalk mark on the coat. All measurements were made to the chalk mark on the coat. Mr. SPECTER. On the coat of the President? Mr. SHANEYFELT. That is correct. That is the elevation difference (39.24inches=3.27ft) between the original plat and the WC final CE884 documentation. That difference being how high(vertical) above the ground (same physical street location) the chalk mark was. So, 423.07 + 3.27 = elevation 426.34 = between z210-z222

The following supporting data will show Specter's inverse SBT. Starting with: Mr. KELLEY. The officials at Hess Eisenhardt, who have the original plans of the President's car, conducted a test to ascertain how high from the ground a person 72 1/2 inches would be seated in this car before its modification. And 132 it was ascertained that the person would be 52.78 inches from the ground--that is, taking into consideration the flexion of the tires, the flexion of the cushions that were on the car at the time. Mr. SPECTER. When you say 52.78 inches, which individual would that be? Mr. KELLEY. That would be the President. Mr. SPECTER. And what part of his body? Mr. KELLEY. The top of the head would be 52.78 inches from the ground.

Ballistics dictate a different result.

Hard to hit (SBT) what you can't see.

Add the 3.13degree slope from Elm St and Specter's new angle, created by moving the trajectory from the coat chalk mark to just below the collar top, is approx (20.87 = 20deg52min) supporting shot#1 at Elev 423.07 = approx extant Z217. Now, the throat shot at approx Z217(which is physically higher than the back wound), becomes the exit for the SBT from the 6th floor snipers nest. Since clever old Arlen possessed all the material/information, it wasn't hard for him to make it fit.

Adam, Thank you for providing this document.

Jake, Once again, without even getting into the trajectory/ballistic specs, Specter knew he had problems fitting everything back to the TSBD southeast 6th floor and was trying to remedy them. http://educationforum.ipbhost.com/topic/25394-shirt-bunching-experiment-sbt/?do=findComment&comment=390064 Mr. SHANEYFELT. That is 44 feet from station C--91.6 feet to the rifle in the window from the actual chalk mark on the coat. All measurements were made to the chalk mark on the coat. Mr. SPECTER. On the coat of the President? Mr. SHANEYFELT. That is correct.

Realize the integration/importance of a shot #2, as listed on the plat.

Look for a spread of approx 52.9ft I believe 52.5ft would do nicely:

Subtract the new hypotenuse measurement from the old: 241.5 - 188.6 = 52.9ft

Note the new hypotenuse measurement of 241.5 ft: Mr. EISENBERG. Would you go on to the third? Mr. SIMMONS. Using the 1.4 mil aiming error, and the round-to-round dispersion, giving a total error of 1.43 mils, the probability of hit at the 175 foot target is 0.99; at 240 feet it is 0.91; at 270 feet it is 0.85.

Apply a 4.6 degree difference to CE884 Z222:

Creative math by Arlen Specter. Here's a start:

Perhaps showing how Arlen tried to fit an angled peg into a round hole might help.

Not quite 25 degrees from the 6th floor.

The HSCA supplied a lateral angle of 27 degrees. More than likely R.Sprague's work. This would allow Connally's back shot from the 7th floor window sill. I haven't found any photos/movies (Bell, Powell) in the aftermath, which show that window open. Doesn't mean it wasn't closed after it was used.

The rooftop ledge approx 15.25ft west of the southeast TSBD corner. This is well above the WC sniper's nest boxes. The distance traveled by the 25 degree bullet would be approx 202ft, compared to the CE884 data of 199ft for Z235. https://drive.google.com/file/d/1MwHW5gIPS5-rpWDj1p4LEKOGYuzbSWTg/view?usp=sharing

What did they do to convince you it came from the snipers nest? Film using a scope on top of a box platform. The only problem is the angle they set for their support box is incorrect. It's quite obvious when you compare the box edge in the foreground to their box edge beneath the scope. So it was well known during this recreation (circa Nov26-1963) that the truth would not be told.

Yes, The WC literally/figuratively boxed themselves in. If they would have plotted Z222 on the west end of those lane markers, everything would be hunky-dory, but Their time and place sync (Z222/snipers nest) for a back shot just doesn't work. Unless, the box was transparent, used as a silencer and bullet speed reducer(triple purpose-quite clever) shooting through it, then it all makes sense. Especially that shallow back entry. Anyhow, the math for Z222 is: 490.9 elevation - 426.11= 64.79ft = Height to window frame sill Rifle barrell end elev = 65.68ft Rifle barrell above sill = .89ft = 10.68" Rifle barrell above box = .68inches

Rifle Included. Corresponding box edges using red lines.