[Ben Holmes]

(12-31-2016, 01:38 AM)Fendlesworth Wrote:  I've made it Ben.

It has to do with linking angular velocity with the Limo's true velocity. If you want to know if the Zapruder Film has been altered, it would be nice to know the actual speed of the limo as a function of time.

This is doable, and you could compare this with the Nix Film. All you need is a horizontally-stabilized version and a few geometric measurements of Dealy Plaza. You would also need the film's reel speed. You said:

Quote:I would state that from this viewpoint, Zapruder would have the most accurate perspective of the limo's speed.

No. A helicopter view from above would be more accurate. 

Sorry... but there's no difference between a view from the side, and a view from the top...

All you have is a rotated view.

In flatland - you'd have a point - viewing from above would be different than viewing from the side... because in viewing from the side you'd have no idea of the distance traveled.

But in real life, the distance traveled is equally visible from the side or the "helicopter" view of the limo.

Because you can see the distance traveled equally well from either above or from the side.

 

(12-31-2016, 01:38 AM)Fendlesworth Wrote:  

Quote:It cannot "mitigate" a slowdown

Not my choice of words. This is a ridiculous way to frame my post.

You've implied, if not directly stated, that viewing the speed of a limo from the side diminishes one's ability to judge the speed of the limo.

I strongly disagree with such a concept.

 

(12-31-2016, 01:38 AM)Fendlesworth Wrote:  

Quote:...it can only make it most visible.

More visible than what? 

Than the alternatives of viewing a speeding object directly in front of, or directly behind the direction of travel.

Viewing the limo from either the front or the back makes it difficult to judge speed - as you have a poor perspective of the distance traveled.

This isn't true when viewed from the side... where you CAN view the distance traveled, and judge the speed more accurately than any other perspective.

 

(12-31-2016, 01:38 AM)Fendlesworth Wrote:  

Quote:...and there's nothing in such a perspective that would disguise the speed of the limo.

Yes there is, but an odd choice of words.

Feel free to cite for your assertion.

The measurement of speed at a single point... a point within the limo - would of course be the most accurate - as at that point - you can measure the distance traveled, and the time it takes to travel it. Which is, of course, the definition of velocity.

The measurement of that same velocity at a point located a short distance (say, 25-50 ft away) to the side of the limo would be imperceptibly inaccurate due to the angle of view.

It would not change the perception so drastically as to hide the fact that the limo slowed dramatically.

Until the film was examined frame by frame, and precise measurements taken of the limo in those frames - NO-ONE HAD EVER STATED THAT THE LIMO SLOWED DOWN IN THE ZAPRUDER FILM.

That's an undisputed fact.

And one still unexplained by those who believe that the eyewitnesses were correct in what they saw. (As you clearly accept.)

 

(12-31-2016, 01:38 AM)Fendlesworth Wrote:  

Quote:If you have a point, you're more than welcome to make it.

I have, and didn't expect it to be greeted by your condescending bullshit.

Feel free to rebut anything I've stated.

If you cannot, then it's not my problem. Ad hominem will not change that...

You expect to make un-citable claims about the evidence in this case - and make assertions you want everyone to believe?

Not going to happen. (Equally true for me, of course...)

 

(12-31-2016, 01:38 AM)Fendlesworth Wrote:  Again: The Limo appeared to be travelling the slowest at the point where it should have been appearing to be travelling the fastest (assuming constant speed); orthogonal to Zapruder's line-of-sight.

Yep... that's absolutely true.

You are presuming what you cannot demonstrate... that the Zapruder film is un-altered.

All you have to do is take a Bell & Howell camera Zoomatic Director Series Model 414 PD, and film a car driving down a street. Demonstrate that the camera doesn't capture a dramatic slowdown that can be seen by eyewitnesses.

Indeed, I think most people would be happy if you used ANY CAMERA AT ALL - and were able to show this.
 

(12-31-2016, 01:38 AM)Fendlesworth Wrote:  You might expect that the Limo actually slowed-down more than that percieved by the viewer. 

If you think that humans have some infallable speed-sensing abilities, take a look at this paper: Apparent Speed of Sampled Motion

Percieved speed is relative to the observer. The Limo's true speed is what really matters. Percieved speed can change as the angle and distance changes between the object and the observer.

Sorry, I rather suspect that most people would not feel you've made your case.

What you're attempting to show is that the camera cannot show what people have seen.

It's a good way to avoid the evidence of Zapruder film alteration - but I would state that you've not made the case.

And indeed, it would be simplistic for you to prove it - SIMPLY TAKE A CAMERA AND SOME EYEWITNESSES, AND FILM A MOVING VEHICLE.