Chris Davidson

Let's use Myers 108% manipulation to sync his distance difference with CE884: 79.2ft x 1.08% = 85.536ft 85.536ft - 79.2ft = 6.336ft 6.336ft - .9ft = 5.436ft difference Now refer to the distance per frame traveled from CE884 z161-z166 = .18ft per frame traveled The WC difference comes in the span of z133-z161 = 30.2ft (Station# 299- 329.2) 30.2ft x .18ft = 5.436ft How many frames might we be dealing with for that equation: 30.2 /.18 = 167.77

https://drive.google.com/file/d/1bRS49wIfblFnXYW8bj9iL3oUnIU3MXRX/view?usp=sharing The difference between the two graphics, via Myer's work is 108% As can be seen, when the top frame layer is increased 108%, the plat becomes the same size. Working from Station# 250.0 (SE TSBD window edge) to Station# 329.2 (CE884-z161) = 79.2ft 79.2ft x 1.08% = 85.536ft 250 + 85.536ft = 335.536ft 335.53ft - .9ft = Station# 334.636 (See speed increments below) Now, tie that to the TSBD corner = Station# 245.5 = 4.5ft short of the (SE TSBD window edge). 245.5 + 85.536 = 331.03 331.03 - .9 = Station# 330.13 CE884 z166 = Station# 330.10 Now, take the average speed (see below) of z133-z166: 14.88 + 11.99 = 26.87/2 = 13.435mph 13.435 x 1.47 (1mph) = 19.749ft per sec /18.3 = 1.0792ft per frame = (1.08) = 5frames @ 1.08ft per frame = 5.4ft - .9ft(BS distance from z161-z166) = 4.5ft = Distance from SE TSBD window edge to TSBD corner Average speeds via West path (in which the splices reside) using "JFK within limo" as measuring target: z133-z149 = 14.88mph. Station# 299 - 318.125 z149-z166 = 11.99mph. Station# 318.125 - 334.5 = (329.2 + 5.3) z166-z182 = 13.53 mph. Station# 334.5 - 351.9 z182-z201 = 11.40mph. Station# 351.9 - 369.3 z201- z222 = 10.83mph. Station# 369.3 - 387.58 Average = 12.52 mph 18.3/1.47 = 12.45mph = 1ft per 1 frame

Fine Tuning through 3 splices 1336/48 = 27.833... sec 27.8333...sec x 18fps = 501 frames - 15 frames = 486frames 167 + 167 + 167 = 501frames 1336 - 354.66 (133 x 2.6666) = 981.34 981.34 / 2 (remove 1/2) = 490.67 490.67 x .75 (remove 1/4) = 368 368-353 = 15 frames 15 frames / 3 splices

Beautiful. Jump the frame count.

470.666 to 486 = 15.33.. frames 15.33 frames / 3 splices (z133, 157, 207) = 5+ frames per slice More frames within splice, missing. Same as Towner splice. Average speeds via West path (in which the splices reside) using "JFK within limo" as measuring target: z133-z149 = 14.88mph. Station# 299 - 318.125 z149-z166 = 11.99mph. Station# 318.125 - 334.5 = (329.2 + 5.3) z166-z182 = 13.53 mph. Station# 334.5 - 351.9 z182-z201 = 11.40mph. Station# 351.9 - 369.3 z201- z222 = 10.83mph. Station# 369.3 - 387.58 Average = 12.52 mph 18.3/1.47 = 12.45mph = 1ft per 1 frame z133-z207 = 74 frames 74/18.3 = 4.04seconds 4.04seconds x .102ft per sec (12.52-12.45) = .41ft 15.41ft vs 15.33frames Close enough for WC work.

Frame syncing for one. 1296 = 486 x (48/18) 354.6666666 = 133 x (48/18) 941.33333 = (1296 - 354.66666) 470.666666 = (941.3333 / 2) 470.666666 - 25% = (1/2 x 1/2) = 353 470.666666 - 353 = 117.666 How many frames from 470.666 to 486? What's the difference between z118 and z133?

The frame span for "JFK within the limo" using Robert West's path is 28 frames. 28 x 2.6666 (48/18) = 74.666 frames 74.666/2 (1st pass) = 37.333 frames 37.333/2 (2nd pass) = 18.666frames Myers has the same span as 18frames.

There are additional frames missing within the splice, which means there are additional frames missing outside the splice. (Math to the rescue). This means Towner's film possessed more frames originally than what Meyers based his 22.8FPS rate on. Since Towner's camera was an 8mm camera, there was no 24fps setting for it. Myer's knew this. It would have been too obvious to list 24fps as the sync rate for the multi-film project he did. This leaves one option for the original Towner frame rate. Can you guess what rate she filmed at? Zapruder comes to mind.

166 frames x .3 ft per frame = 49.8ft. But, with the PositionA pivot: 48.9ft (West path) + .9ft (= +3 frames) = 49.8ft 50.7ft (Shaneyfelt path) - .9ft (=. -3 frames) = 49.8ft Same distance, different paths to get there.

David, you asked me about 166 frames I believe. The Shaneyfelt path, the upper part of the blue triangle = a distance difference of 50.7ft (see red boxes above). 169 frames x .3ft per frame = 50.7ft = distance between PositionA and extant CE z161. 169frames -166 frames = 3 frames 3 frames = the span of Orange colored CE884 z168-z171 z168-z171 = a speed of .3ft per frame. 3frames x .3 = .9ft = distance traveled for CE884 z168-z171

In other words, If someone told you there was a 7 frame splice in a film, the removal of 7 (alternating/additional) frames within that same splice, would still allow the limo to move without any hiccups whatsoever because the speed per frame (.6ft) represented the average speed.

Ron, Let me try to simplify the concept with this: The graphic shows what Myer's specs would be for the limo travel between the Dal-Tex corner and the TSBD corner. He shows 18 frames and 12.7ft traveled. I plotted the same span but use Robert West's path (original surveyor) for my measurements. The difference between the two (Myers and me) is within the red boxes. The frame count difference is 28-18 = 10. The distance difference is 23.75 - 12.7 = 11.05ft. 11.05ft over an 18.3 frames per sec span = .603ft per frame Do you see that the distance per frame removed was in keeping with the (distance per frame travel average via the WC)?

Refer to this post for a better understanding of the concept:

The difference between using JFK as your "measuring object" vs the "center of the lower rear tire" is 7 frames. The Dal-Tex corner is the stationary background object. Of course, the difference in distance would be the inside arc path (tire center) vs. the outside arc path (JFK).

StationC location for JFK "within the limo", on the extant Towner film, is inside the green box. It is superimposed over a graphic from Myers (multi-film sync project) to give you an idea where it lands in relationship to the Towner designated splice.

Something like this: http://educationforum.ipbhost.com/topic/22692-swan-song-math-rules/?do=findComment&comment=372136 https://drive.google.com/file/d/1wBURGPKHRQGA9VpeUhLic6LRe2OEYgnS/view?usp=sharing

Something to keep in mind, 1" = 10ft The thin blue lines = 10.2ft The PositionA pivot down to the Robert West path = 5.3ft That total distance of 15.5ft = the (StationC- 234.5 to Station-250.0 (SE sniper window edge) =Towner filming position. Anyhow, back to frame counting.

PositionA within the Towner film along JFK's (Robert West true designation) path is one frame short from where Towner's LOS aligns JFK with the big background structure. Or, if the extant Towner film consists of 167 frames, 21 frames from the end of Towner = PositionA. Extant Towner 146 =PositionA If you refer to the enlarged plat, the green arrow points to the gap between (the Towner LOS through JFK to the structure) and the PositionA pivot where it would land on that same path. Count 72 Towner frames from Towner 146 to arrive at StationC.

No, it's not. Total extant frames in Towner 167. Had to take Towner into consideration. What ratio removed from 48/18 = 1 whole (second/frames) Put differently, 2.666.. - ??? = 1

The WC was polite enough to give us their working average for the blue triangle span. Of course, when is frame166 not representative of 166frames? When the WC is involved. 100ft/166frames (actually 166.666... for another time though) = .6024ft per frame x 18.3fps = 11.024ft per sec = 7.5mph Since their distance from StationC to PositionA was 44ft, we can arrive at a frame count for that span. 44ft/11.024ft per sec = 3.991... x 18fps (whole frames) = 71.84frames

The location that is StationC =. Station# 234.5 to Station# 329.2 (extant z161) = 94.7ft + 5.3ft = Station# 334.5 = distance of 100ft = the intersection of (Zapruders LOS and Robert West's path) then back to the WC labeled PositionA = the hypotenuse. Of course 5.3ft being the Pivot of PositionA into a right triangle. Let the WC confirm that for you:

Briefly, Rotate the blue triangle clockwise so the WC labeled PositionA connects to the "+" mark representing Station# 275.0 A right triangle is then formed by extending the base to the intersection of (Zapruders LOS and Robert West's path) then back to the WC labeled PositionA = the hypotenuse. Something along this line: https://en.wikipedia.org/wiki/Geometric_mean_theorem Onto frame counting. within this blue triangle span.

The blue shape for those who need help.

The "official" WC documentation put the distance between StationC and extant z161@ 94.7ft. If you care to use my "unofficial" path described above, my distance = 45.8ft + 48.9ft = 94.7ft. The same distance. What a surprise. Can you guess what geometric shape is formed when combining the official and unofficial paths?

PositionA residing on JFK's path = Station#280.3 (leftside blue box) StationC resides at Station# 234.5. (rightside blue box) Difference = 45.8ft 45.8ft/18.3ft = 2.5ft elevation change when total distance retains the 3.13degree slope. Difference between PositionA elevation 428.7 and 418.48 (z313) 10ft - 7.5ft (z161 to z313 elevation change) = 2.5ft elevation change 7.5ft/10ft = .75 10ft/7.5ft = 1.333...