10-02-2015, 06:14 PM
Bob Prudhomme Wrote:Hi David
My head is reeling from all of the numbers, and the obvious contradictions in a lot of the data. Chris Davidson is helping me design a model over at the Ed Forum, and supplying me with most of the numbers.
So far, this is what I have for a head shot at z313.
Trajectory, from the WCR - 265 feet at a downward angle of 18°
Vertical height from street to rifle on 6th floor - 61.2 feet
Drop from TSBD to z313 (3.13° downhill slope) - 11.76 feet
I created a right angle triangle with a hypotenuse of 265 feet and a vertical rise of 61.2 + 11.76 = 72.96 feet and, using C² - A² = B², found the base of the triangle to be 255 feet. The only mistake I may have made is not adding the height of the curb, in 1963, to the vertical side of the triangle. I think Chris mentioned something about this, and I am awaiting a reply from him.
Do all of the numbers above seem okay to you? I am trying to lay out a triangle based model that will have an additional line running uphill the the vertical side of the triangle at 3.13° that will represent Elm St. By placing the limo and follow up car on this line, it should be possible to determine, at various separating distances, if a six foot man riding a foot above the asphalt on the running board of a '56 Cadillac will block the view of JFK or not.
And here are the two shots location per the SS...
4 feet from 5+00 is either 5+04 or 4+96...
WCD298 tells us that Z313 was 262' versus the last shot at 307'. 307-262=45 feet
The legend and the SS statement creates a 39 foot base (5+04 minus 4+65) or a 31 foot base.
From JFK to the front of the limo was about 15 feet
With the adjustment BACK at the top of Elm and forward at the bottom, we have our 30+ feet of difference related to the location of the final shot... (I think that's right, Chris?)
Once in a while you get shown the light
in the strangest of places if you look at it right..... R. Hunter
in the strangest of places if you look at it right..... R. Hunter