Chris Davidson

There are a couple of sync points for Bell/Wiegman. I used Charles Hester and his entry into the colonnade shadow as my sync point. I lightened him as he appears in the background (just behind the foreground lamp post). The other sync point is Beatrice moving her left hand/arm off the ground and backwards, if one desires to use this as a sync. Difference from the Charles sync to the Beatrice sync = 7 Bell to 11 Wiegman frames The Charles sync span equals 32 Bell frames = 32/15.6 = 2.05 sec.

Mark, Thanks for the link. Some of the information in that PDF comes from his 1996 study. His study listed a total of 29 frames in reference to the previous span described. The copy I have is also of poor quality, but good enough to pull out the first 23 frames, followed by the rest, after that sync.

I used the bumper of the "national press pool" car for the sync between Bell/Paschall. The beginning of Paschall until she syncs with Bell = 23 Paschall frames. The Bell sync frame with Paschall, is also the beginning Bell frame (this will become clearer when I sync Bell/Wiegman) for the next sequence. The Bell frame inset is 1 frame after the sync. I used this frame because it's much clearer in terms of "bumper to stationary object" than the actual sync frame. She used a Bell/Howell 8mm camera (18fps) according to a 1996 Greg Jaynes analysis. 23/18 = 1.28sec

Agreed, and with this said, let's also include the times from extant z313 as a running count. This might make it easier for others to follow along. Z313 - z435 = 122/18.3 = 6.66sec Bell Sync z435 to Bell Stop = 5.19sec I believe you have the Paschall start at 18:56 in your animation. This would equal a gap between Bell stop/Paschall start of 6.65sec. I would tend to agree, but with a possible difference of .05sec (minimal), which I will not include moving forward. 6.66 + 5.19 + 6.65 = 18.5 sec Up next, Paschall.

The sample range will grow larger as I continue on. I believe you used 18.3fps(average) for Z, I will stick with 15.6fps (average) which is quite close to its factory spec. The progressive frame count from my sync point (Z435) to the end of Bell is 81 frames. 81/15.6 = 5.19sec.

These are the same frames (albeit from different sources) as Groden's version. Quality is a little better. imo Groden's appears to be complete minus a few at the very beginning (before the sync point - not important at this time). This stabilized (my work) gif is from one of the other sources (one of the countless JFK specials with bits and pieces). The gif starts with the same Bell frame I equated to the Z435 sync and ends with the underpass sync. The span = 29 progressive frames.

That's fine. Next would be a sync for both films near the underpass. If you know the Bell (progressive) frame count between this location and the previous z435 location, this will give you a FPS ratio from Bell to Z using 18.3fps per Z.

Continuing forward: Would you agree/disagree that these two frames sync?

I am wrong about Bell's filming location. I agree with your summary. I wonder if he just hopped down right in front from up above. If not, that is quite alright. That said, this changes only slightly, the syncing of Bell/Z. More to come. Thanks.

The distance between the two (JFK in the limo) locations in the previous gif (z437-z445.5) = 20.62ft My average speed for this span = 30.2mph. 18.3/8.5 x 20.62ft = 44.39ft per sec /1.47 In your animation, that same frame span yields an average of 30.5mph. Almost matching.

You do have the limo position fairly accurate for extant z437(very important). Bell starts filming slightly before that. Something like this:

I disagree. Start with this: Bell's physical filming location for this segment is incorrect. Bell's starting time for this same segment (extant z460) is also incorrect.

Did you know that the original Wiegman film is 36.5 seconds long? If you used a shortened version say Groden’s version(inset) for syncing, the missing frames occur after Wiegman starts but before his kneel. Your time to his kneel is approx 20.75 seconds. The original syncs this event at 24 + 8/30 = 24.26seconds. 24.26sec - 20.75 sec = 3.51sec = missing film You can then convert those time differences in terms of frame rate: 24.27 x 24 = 582.24 frames 582.24 / 20.75sec = 28.05fps

This might help with the previous post if it appears somewhat confusing. I'll push the frame comparison forward from your animation to z186. You have the limo traveling at 11.1 mph. Adding a missing distance of 5.49ft = 3.74mph over a 1second time frame to 11.1mph = 11.1 + 3.74 = 14.84mph. Deciphered from the previous posting, 14.84mph sits quite appropriately between 14.65/14.94mph. Since Shaneyfelt's testimony included the average figure of 11.2mph via z161/8- z313, your instantaneous speed at z186 complements the desired WC average speed for a distance/time they saw fit to manipulate. imo

Mark, I agree. They do not pass the smell test. The reason they do not is to hide the alteration of the extant film. Plotted, using the location of known stationary objects and "JFK's head within the limo" as the marker. As you can see, the limo was traveling at approx the same speed from(z136-z149) and CE884 (z168-186), disregarding the B.S entry of z168-z171 = 3.74mph. And, coincidentally, adding 5.49 missing feet to increase your mph up to the splice(frame156.5) within a certain amount of frames, would match the same speed (14.65mph) as the plotting provides. The other version of CE884 has the limo move .9ft in 5 frames = 2.24mph You can't smooth this out. The limo had to travel a certain distance (unaccounted for) above and beyond that .9ft. Overlooking this very fundamental concept is a mistake. imo

Mark, One of the most important elements in a study such as yours is the inclusion of distance traveled. imo The following is an example: I have layered two frames from your study: z133.4 -z161.4 = 28 frames Your mph designation for this span has the limo travel from 8.5mph (slowest) to 9.6mph (fastest). This would equal an average of 9.05mph. I've included Sprague's plotting for Z133 which I confirmed via my own plotting at Station# 2+99.0 WC CE884 plotted Z161 at Station# 3+29.2 The distance for these 28 frames = 329.2 - 299 = 30.2ft You used 18.3fps as the frame rate for the extant Zfilm. 28/18.3 = 1.53 seconds. 30.2ft/1.53 seconds = 19.738ft per sec /1.47 (1mph-rounded off) = 13.427mph At 9.05mph x 1.47ft per sec = 13.30ft per sec x 1.53 sec = 20.35ft traveled. 30.2ft - 20.35ft = 9.85ft distance traveled unaccounted for because of the difference in the vehicle speeds. If you wanted to fix this in terms of a different frame rate for the extant Z film, approx 41.55fps would work.

Mark, The mayors car apparently would have been just out of view in Altgens 6. Somewhere between the green arrows. imo Altgens z255- z180 = 75/18.3 = 4.09 sec. The distance traveled from the mayors car front end(you can draw a LOS from Z's pedestal touching the circular wall edge and on through Houston & Elm St) that we see in z180 to Wiegman's beginning is approx 57ft (65ft - 1/2 mayors car length=(8ft). 57/4.09sec = 13.93ft per sec = 9.48mph. If you plot JFK within the limo in Towner (using 18.3fps as a true rate) over the approx same span as the mayors car from z180-z255, the average speed is 8.82mph. This would indicate the motorcade increased (minimally) the speed through the Elm St turn vs the limo.

New sync film to come.

I only suggest the bottom floor location for a "over the limo" miss at approx extant z152, since I can plot two endpoints (path) between bullet impact and shooter which agrees ballistically. That said, it's possible a warning shot (lack of explanation) was fired well above his head from a higher elevation (any floor) at approx extant z152, which could still hit the grass location previously referred to. But Why? JFK's back shot would be indicative of a location from higher up than the bottom floor. imo Since I don't have endpoints for the back shot, there are many possibilities.

David, Did you have a specific shot/limo location in mind?

Similar (check LOS in previous Sprague plat) to this view:

One more analogy. CE560 utilized a lead height of .56ft = 6.7". This was supposed to be from the 6th floor snipers nest using a slant distance of 175ft. You can compare that lead height to what I previously provided: The difference being 60"- 52.78" = 7.22" Fairly close leads, just two different locations. Personally, I believe the DalTex building housed multiple shooters on different floors.

Altgen's z255 LOS was fairly close. His photo(inset) would be approx 5.5sec after z152. Look behind Ladybird/driver/Yarborough for an opening in the crowd. It would have to come from the windows directly above the cycle cop within the inset. Does it lead back to one of those bottom floor windows?

Too much activity over by the DalTex bottom floor windows. If they are slider windows, the openings reside at the same elevation as the platform previously mentioned.

Extant zfilm with missing frames added via Groden version. Human reaction to an external stimuli = approx 5 zframes. JFK head turn.