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Posts posted by Chris Davidson
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David,
Thanks for that.
Yes, I made a mistake in adding to the elevation instead of subtracting.
The elevation change from z313 to z273 is 1.587ft.
Street elevation for z273 = 420.06, which, if you look at where I have it plotted with the intersecting lines (from a previous posting) is correct now.
Change in elevation from Criminal
RecordsCourts Building base is 430 - 420.06 = 9.94ft113.2 - 9.94ft = 103.26ft high in Criminal
RecordsCourts Building.3.27ft vertical = 1 degree when converted from survey info on z313.
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On 5/2/2017 at 2:04 PM, Chris Davidson said:
Simmons testimony stated this:
https://drive.google.com/file/d/0BwrExtVD005OaGNId0g3UWRsakk/view?usp=sharing
That baseline distance of 242.8 and angled 267ft from the Criminal Courts building.
Sound familiar!!!
Something like this in terms of relevant distances.
https://drive.google.com/file/d/0BwrExtVD005OSVJiQjJLSWd6eVU/view?usp=sharing
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The height needed for a 25 degree downward angle is 113.2ft.
113.2 - 12.97ft = 100.23ft approx.
100ft up in the corner of the Criminal Courts building is where you'll find the shooter.
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The base of the Criminal Courts building appears to be at elevation 430ft.
The limo elevation at z273 = 430 - 12.97ft (that's using z313 @ elevation 418.48 per CE884).
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The "base" distance from z273 to the Criminal Courts building is 242.8ft.
https://drive.google.com/file/d/0BwrExtVD005OYnpBdm9JenNKeWc/view?usp=sharing
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The rooftop of the Dallas County Criminal Courts building is listed as 120ft high.
https://drive.google.com/file/d/0BwrExtVD005ORkNleXdnNVQ4S1E/view?usp=sharing
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Here's what it looks like plotted:
https://drive.google.com/file/d/0BwrExtVD005OcXdZeGRwTFhXd1k/view?usp=sharing
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The red line provides a LOS traversing the light post and the Z pedestal.
In other words, if you are Zapruder at approx z273 and you tilt the camera upward, guess who/where you would see on the other end?
https://drive.google.com/file/d/0BwrExtVD005OZXFrWko4VVlpd28/view?usp=sharing
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On 5/2/2017 at 2:01 PM, Chris Davidson said:
If Dr.Shaw had listened to Dan Rather's description of Connally's actions/position, knowing that Rather was trying to connect it back to the TSBD, he would have realized or did realize where that shot actually came from.
https://drive.google.com/file/d/0BwrExtVD005OQ2Fpd2pJN2prd2c/view?usp=sharing
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On 5/5/2017 at 9:59 AM, Chris Davidson said:
David,
What happens to the limo speed on film when it's moving at
3.74mph3.737… mphIn case others had forgotten:
11.2mph = 7.47
5+ 3.735https://drive.google.com/file/d/0BwrExtVD005OWHdpUkZUX29MaHM/view?usp=sharing
3.735 = 1/2 of 7.47
3.735 = 1/3 of 11.2
7.47 = 2/3 of 11.2
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2 hours ago, David Josephs said:
So we're back to the change from 48fps to 24fps yet there is another conversion to 18.3fps requiring the removal of another 23.75% of the frames if 50% of ALL the frames are removed...
Q1: Which 4 frames are you talking about? We were talking about 301-313 or 12 frames to travel 7.205' or 7.33'
Q2: If 50% of the frames are removed from this sequence, then much more than 66% would need removing elsewhere to wind up with 18.3... PLUS if Nix is filming at his 16-18fps the 24fps cutdown will not match... Using 50% just because the results are closer to what you want to see doesn't mean that 50% is correct... on the flip side during 285-334 it is very possible that only 50% are removed there, starting at 161 yet changing that to 168, helps with some more frames, some more distances and speeds.According to your calcs,there would have been 24 total frames from 301 to 313; total distance 7.205'. 7.205/24=.3002 feet per frame = 3.74mph
(How do you get 24 frames as a starting point when the camera speed is either 16 or 48fps?)
According to mine there would have been 32 total frames from 301 to 313 (@ 48fps); same distance 7.205/32=.22516' per frame = 2.81 mph * 2.623 (48/18.3) = 7.37mph at 18.3fpsSo again, which 4 frames within 301-313 are you talking about?
Q1. The Itek study is four frames per entry:
A2-A6 = z285-z289
A6-B = z289-z293 which is where the aberration in limo speed occurs.
Q2. z289 + (48 frames /2) = 24 = z313
I'm not describing four frames within z301-z313.
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This is how I would distinguish the difference between the 7.33ft/7.205ft which equates to 7.6mph/7.474...mph using what I have already supplied:
1.5mph x 1.47ft per sec = 2.205ft
4frames/18.3 = .2185…sec
.2185sec… x 2.205ft = .4819ft…
.4819ft… / 4frames = .1204ft per frame
7.205ft + .1204ft = 7.325ft…
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David,
What happens to the limo speed on film when it's moving at
3.74mph3.737… mph -
7.205ft x (18.3/12)1.525 = 10.987625ft per sec / 1.47 =7.4745… / 2 = 3.737… mph
Refer back to these:
https://drive.google.com/file/d/0BwrExtVD005OS0RxREpjXzRCSmc/view?usp=sharing
https://drive.google.com/file/d/0BwrExtVD005ONHcwYnZEeDRPRkU/view?usp=sharing
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I believe the distance traveled from Z301-z313 = 7.205ft, which is slightly less than the Itek study. (See previous link)
7.205ft x (18.3/12)1.525 = 10.987625ft per sec / 1.47 =7.4745… / 2 = 3.737… mph
Why!!!
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18 hours ago, Chris Davidson said:
Itek data results connected to CE884's:
https://drive.google.com/file/d/0BwrExtVD005ONHcwYnZEeDRPRkU/view?usp=sharing
The last 12 frames of the Itek study:
The average of 7.6mph for this span = 7.33ft(z301-z313) traveled.
7.33ft x (18.3/12)1.525 = 11.178...ft per sec / 1.47 = 7.60… mph
https://drive.google.com/file/d/0BwrExtVD005OekFNcjdFUlVqS1E/view?usp=sharing
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Itek data results connected to CE884's:
https://drive.google.com/file/d/0BwrExtVD005ONHcwYnZEeDRPRkU/view?usp=sharing
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Excerpt:
"BREHM expressed his opinion that between the first and third shots, the President's car only seemed to move 10 or 12 feet. It seemed to him that the automobile almost came to a halt after the first shot, but of this he is not certain. After the third shot, the car in which the President was riding increased its speed and went under the freeway overpass and out of his sight. "
Even with the 10.7mph aberration, the distance traveled is 12.3ft. At a constant 9.2mph the distance = 11.8ft
Translated:
After Connally took shot 1, the limo traveled approx 10-12ft until z301, where it almost stopped and kept that speed until shot 2 at extant z313, after the third shot which blew JFK's head off (Altgens), the limo accelerated.
I refer to three shots as only occurring after extant z280, there were more shots previous to this point.
https://drive.google.com/file/d/0BwrExtVD005ObnZ1TkNlUEFHYTg/view?usp=sharing
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https://drive.google.com/file/d/0BwrExtVD005OREFwQTR2ZTJEYUk/view?usp=sharing
Itek's study of limo during its last 28 frames of travel ending at extant z313.
btw, 313-28 = frame 285
https://drive.google.com/file/d/0BwrExtVD005Oc19wcXJBUTBHRVU/view?usp=sharing
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Frame Removal:
The limo (according to Sam Kinney-driver of the follow-up car) slowed down from between 3 to 5mph.
In this case, frames within a given time period (circa extant z280-z347) existed and we were led to believe this represented the true count. Yet, at least half of these frames were excised.
Lets explore this:
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The TSBD is 100ft long.
If I move a shooter from the east end to the west end that's approx a 100ft move.
The difference between 240ft and 143ft = 97ft.
That would seem fairly close to 100ft.
https://drive.google.com/file/d/0BwrExtVD005OZDQyTG9XeTZGQ1E/view?usp=sharing
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Simmons testimony stated this:
https://drive.google.com/file/d/0BwrExtVD005OaGNId0g3UWRsakk/view?usp=sharing
Splice in Tina Towner Film
in JFK Assassination Debate
Posted · Edited by Chris Davidson
Also made the mistake of using the measurement from the wrong side of the DCCB.
So corrected, it would look like this.
114.1 - 9.94 (elev change for z273) = 104.16
Sorry about that.
https://drive.google.com/file/d/0BwrExtVD005OTEFjSnVsTlF6ME0/view?usp=sharing
P.S. Don't know exactly (which floor) where 104.1 ft is, up in the DCCB, so the graphic is just a guess.