Author Topic: Flight Path And Related Issues  (Read 984142 times)

Offline Shutter

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Re: Flight Path And Related Issues
« Reply #3360 on: October 16, 2020, 05:59:14 PM »
Actually, there is a conflict. the crew did report the nose dipping which implies the AP was off. the document didn't appear to have spoke with the crew. He was curious if it was on or not. the other document states the crew said it was on for a better part of washington or to that affect. it's normal procedure for reasons explained. the person in the document appears to be the one who examined the FDR looking for the bump. one was found at 8:09 in another document.
« Last Edit: October 16, 2020, 06:12:55 PM by Shutter »
 

Offline Shutter

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Re: Flight Path And Related Issues
« Reply #3361 on: October 16, 2020, 06:02:39 PM »
Quote
But the aerodynamics of this fiberglass skirt are going to be completely different from the aerodynamics of the placard.

I'm sure the same goes for the placard being square and normal vs torn in sections.
 

Offline Chaucer

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Re: Flight Path And Related Issues
« Reply #3362 on: October 16, 2020, 06:07:48 PM »
I’m going to assume that you have never been hunting. I have. Many times. People don’t hunt in specific “hunting grounds”. I know I never have nor have I ever used the phrase “hunting ground”.  People hunt in the woods not on specific areas. The idea that the panel was found on any specific area for hunting is nothing more than an assumption on your part - particularly as there is nothing about it in any official documentation. The best we can say is it was found “near Cinebar”.

Also, I cannot make sense of you using the Cinebar find as an example of evidence for the Western flight path while simultaneously saying that it shows the FBI flight path was off to the East.
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Offline Robert99

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Re: Flight Path And Related Issues
« Reply #3363 on: October 16, 2020, 06:10:12 PM »
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One other point.

The FBI Flight Path arguably depicts 305 making all kinds of turns in and around Portland/Vancouver. However, an FBI file in Part 12, Page 181 quite clearly asserts that the airliner was on autopilot during this phase.

Does the FBI Flight Path in any way resemble an airliner on autopilot? Does the Western Flight Path resemble an airliner on autopilot?

The FBI flight path does not resemble anything that would be on autopilot, on probably not even under human control. 

If the airliner was on autopilot it would be tracking down the Seattle VORTAC radial that determined the centerline of V-23 until it reached the Malay Intersection.  When the Western Flight Path kicks in at the Malay Intersection, the autopilot would be set to track a heading as provided by the Seattle ATC Center.

If the airliner was on autopilot when Cooper jumped, the pilots might not even notice it.  Even in 1971, autopilots could fly the airliner better than the pilots and would immediately retrim the aircraft without pilot intervention and maybe even without their knowledge.

ADDENDUM:  Changes were made to the first paragraph above since I obviously misread the original post.
« Last Edit: October 16, 2020, 06:24:32 PM by Robert99 »
 

Offline Robert99

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Re: Flight Path And Related Issues
« Reply #3364 on: October 16, 2020, 06:14:06 PM »
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EU,

1. I never said the panel wasn’t from the 305. I think it likely was.

2. You keep referring to these “hunting grounds”. You yourself have said that the hunting grounds was an assumption on your part. There is no reference to hunting grounds in the FBI memo.

3. Before you said the calculations you made indicated a drift of 7 or 8 miles and that was a conservative estimate. Now you are saying it indicates a more easterly path?

4. What 305 was doing around Portland has nothing to do with the panel at Cinebar.

I'm not saying that you said it didn't come from 305, I'm merely crafting an orderly argument starting with "the panel is from 305."

Hunting lands are not an assumption, they exist and are located east of Cinebar. I used the word "public" in a previous description. I suppose one could argue that this hunter was on private land somewhere else even though that seems unlikely given the large public hunting region right there.

Also, the 7-8 mile drift analysis was for the placard, not the fiberglass skirt. The fiberglass, which is much larger than the placard, would drift 1-2 miles according to my estimations.

Finally, the comment about the autopilot is separate and doesn't relate specifically to the skirt.

Depending on the weight and size of the fiberglass skirt, it possibly could have drifted as far or further than the placard.  Does anyone have information on how much one square foot of the fiberglass material weighs?
 

Offline Shutter

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Re: Flight Path And Related Issues
« Reply #3365 on: October 16, 2020, 06:15:52 PM »
A call to what's his name in Washington northwest historical. can't remember his name. he told me it wasn't fiberglass, it was something else. Bruce Kitt
« Last Edit: October 16, 2020, 06:22:53 PM by Shutter »
 

Offline Robert99

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Re: Flight Path And Related Issues
« Reply #3366 on: October 16, 2020, 06:28:46 PM »
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Actually, there is a conflict. the crew did report the nose dipping which implies the AP was off. the document didn't appear to have spoke with the crew. He was curious if it was on or not. the other document states the crew said it was on for a better part of washington or to that affect. it's normal procedure for reasons explained. the person in the document appears to be the one who examined the FDR looking for the bump. one was found at 8:09 in another document.

That little "bob" may have been caused by the stairs slamming into the rear fuselage.  And that slamming could probably be felt as well as heard by the crew.  In fact, since the crew was expecting a "boom" at any moment, they may have created the "bob" by jumping a bit in their seats.
« Last Edit: October 16, 2020, 06:31:28 PM by Robert99 »
 

Offline Shutter

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Re: Flight Path And Related Issues
« Reply #3367 on: October 16, 2020, 06:29:51 PM »
Correct...that time was marked by the FDR..
« Last Edit: October 16, 2020, 06:30:42 PM by Shutter »
 

Offline EU

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Re: Flight Path And Related Issues
« Reply #3368 on: October 16, 2020, 07:07:03 PM »
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Actually, there is a conflict. the crew did report the nose dipping which implies the AP was off. the document didn't appear to have spoke with the crew. He was curious if it was on or not. the other document states the crew said it was on for a better part of washington or to that affect. it's normal procedure for reasons explained. the person in the document appears to be the one who examined the FDR looking for the bump. one was found at 8:09 in another document.

Where does this document say the crew felt a dip? It says there was a small dip noted on the FDR.

Regardless, it seems unanimous that the airliner was on autopilot when DBC jumped.
« Last Edit: October 16, 2020, 07:07:49 PM by EU »
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Offline EU

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Re: Flight Path And Related Issues
« Reply #3369 on: October 16, 2020, 07:09:56 PM »
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A call to what's his name in Washington northwest historical. can't remember his name. he told me it wasn't fiberglass, it was something else. Bruce Kitt

The skirt is fiberglass. I spoke with the guy in Portland who owns the 727 house, visited the 727 at the air museum in Tucson, and you can see that it was shattered after it landed in Reno.
Some men see things as they are, and ask why? I dream of things that never were, and ask why not?

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Offline Chaucer

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Re: Flight Path And Related Issues
« Reply #3370 on: October 16, 2020, 07:32:10 PM »
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Regarding the Cinebar panel find:

I have attached a map that demonstrates the distance from Cinebar to the assumed FBI flight path.  I measured the distance to various points along the FBI flight path as shown on the "yellow map".  I used the center of town as a reference since we do not know the exact location of the find; therefore, I would allow for a 2 miles radius around Cinebar as a margin of error.

I'm certain it is not perfectly exact, so please allow for a reasonable margin of error.

As you can see, the distance from the FBI flight path to Cinebar ranges from 9.7 to 26.5 miles. Using EU and R99's own calculations, this would seem to put the panel find within the range of the FBI flight path as 305 passed by Cinebar to the west.

Based on this, I think this calls into serious question the panel find as evidence of a western flight path (the distance for the panel to travel seems too far). Actually, it seems more in line with the conventional FBI flight path.

However, I encourage all of you to factcheck me, correct any errors, and draw your own conclusions. I'm prepared to be wrong about this!

Chaucer,

You have just flunked Map Reading 101.

I cannot find Cinebar on an aeronautical chart but can find Mossyrock.  Mossyrock is 11 statute miles EAST of the centerline of V-23. 

Your depiction of the FBI flight path is several miles WEST of the centerline of V-23.  You have Onalaska plotted well EAST of the FBI flight path while in fact it is about 1 statute mile WEST of the centerline of V-23.

You have the FBI flight path passing several miles south of Toutle while in fact the centerline of V-23 passes directly overhead of Toutle.

All indications, including two position reports, indicates that the airlines was tracking down the centerline of V-23 from SEATAC to the Malay Intersection.  The airliner was within a thousand feet of the centerline of V-23 the instant it left the ground at SEATAC (and for that matter the entire time that it was on the ground at SEATAC).

The so-called Western Flight Path describes what the airliner probably did immediately after passing the Malay Intersection.  And that is it continued straight south with respect to the grid lines until it was in the vicinity of the
Canby Intersection.  At no time would the airliner be more than about five statute miles from the western edge of V-23.

There is apparently no information available as to exactly where the fiberglass skirt was found in the Cinebar area.  So no definite conclusions can be drawn as to how far it drifted in the wind.  But the aerodynamics of this fiberglass skirt are going to be completely different from the aerodynamics of the placard.

Chaucer, in lieu of detention, you are directed (not asked or suggested!) to go to the FAA's web page and download their free publication on aircraft navigation.  Then read the damn thing!  Material in that publication will be on the absolute final on this matter.
And you, Robert, have flunked Reading Comprehension 101.

Nowhere in my original post did I use the phrase “V23”. I specifically said that I used the FBI flight path as shown on the “yellow map”.  For some reason you choose to use “V23” and “FBI flight path” interchangeably.

Moreover, I also specifically said that my depiction wasn’t perfect and there would be a reasonable margin of error.

Lastly, nothing you posted changes what the map shows:  that the panel find at Cinebar adds more credence to a central flight path than a western one.

I suggest you go to your local library, check out some Dr. Seuss books and have a trusted relative read the damn thing to you.
« Last Edit: October 16, 2020, 08:15:41 PM by Chaucer »
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Offline Shutter

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Re: Flight Path And Related Issues
« Reply #3371 on: October 16, 2020, 07:32:34 PM »
The crew was quoted multiple times in newspapers of having to adjust the trim due to believing Cooper bailed? might be in the 302's as well..the autopilot can be used multiple ways vs one option. if they adjusted the trim the auto was off. if it was on the auto does it. the document I post states it was on most of the time in WA. and further south..I still don't know what this proves..
« Last Edit: October 16, 2020, 07:34:10 PM by Shutter »
 

Offline Robert99

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Re: Flight Path And Related Issues
« Reply #3372 on: October 16, 2020, 08:28:14 PM »
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The crew was quoted multiple times in newspapers of having to adjust the trim due to believing Cooper bailed? might be in the 302's as well..the autopilot can be used multiple ways vs one option. if they adjusted the trim the auto was off. if it was on the auto does it. the document I post states it was on most of the time in WA. and further south..I still don't know what this proves..

Any change in the trim would be small regardless if it was done by the pilots or the autopilot.  Cooper, the money, the parachutes, and anything else he had attached to him would weigh about 225 pounds while the airliner probably weighed something on the order of 150,000 pounds.
 

Offline Robert99

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Re: Flight Path And Related Issues
« Reply #3373 on: October 16, 2020, 08:32:41 PM »
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Regarding the Cinebar panel find:

I have attached a map that demonstrates the distance from Cinebar to the assumed FBI flight path.  I measured the distance to various points along the FBI flight path as shown on the "yellow map".  I used the center of town as a reference since we do not know the exact location of the find; therefore, I would allow for a 2 miles radius around Cinebar as a margin of error.

I'm certain it is not perfectly exact, so please allow for a reasonable margin of error.

As you can see, the distance from the FBI flight path to Cinebar ranges from 9.7 to 26.5 miles. Using EU and R99's own calculations, this would seem to put the panel find within the range of the FBI flight path as 305 passed by Cinebar to the west.

Based on this, I think this calls into serious question the panel find as evidence of a western flight path (the distance for the panel to travel seems too far). Actually, it seems more in line with the conventional FBI flight path.

However, I encourage all of you to factcheck me, correct any errors, and draw your own conclusions. I'm prepared to be wrong about this!

Chaucer,

You have just flunked Map Reading 101.

I cannot find Cinebar on an aeronautical chart but can find Mossyrock.  Mossyrock is 11 statute miles EAST of the centerline of V-23. 

Your depiction of the FBI flight path is several miles WEST of the centerline of V-23.  You have Onalaska plotted well EAST of the FBI flight path while in fact it is about 1 statute mile WEST of the centerline of V-23.

You have the FBI flight path passing several miles south of Toutle while in fact the centerline of V-23 passes directly overhead of Toutle.

All indications, including two position reports, indicates that the airlines was tracking down the centerline of V-23 from SEATAC to the Malay Intersection.  The airliner was within a thousand feet of the centerline of V-23 the instant it left the ground at SEATAC (and for that matter the entire time that it was on the ground at SEATAC).

The so-called Western Flight Path describes what the airliner probably did immediately after passing the Malay Intersection.  And that is it continued straight south with respect to the grid lines until it was in the vicinity of the
Canby Intersection.  At no time would the airliner be more than about five statute miles from the western edge of V-23.

There is apparently no information available as to exactly where the fiberglass skirt was found in the Cinebar area.  So no definite conclusions can be drawn as to how far it drifted in the wind.  But the aerodynamics of this fiberglass skirt are going to be completely different from the aerodynamics of the placard.

Chaucer, in lieu of detention, you are directed (not asked or suggested!) to go to the FAA's web page and download their free publication on aircraft navigation.  Then read the damn thing!  Material in that publication will be on the absolute final on this matter.
And you, Robert, have flunked Reading Comprehension 101.

Nowhere in my original post did I use the phrase “V23”. I specifically said that I used the FBI flight path as shown on the “yellow map”.  For some reason you choose to use “V23” and “FBI flight path” interchangeably.

Moreover, I also specifically said that my depiction wasn’t perfect and there would be a reasonable margin of error.

Lastly, nothing you posted changes what the map shows:  that the panel find at Cinebar adds more credence to a central flight path than a western one.

I suggest you go to your local library, check out some Dr. Seuss books and have a trusted relative read the damn thing to you.

Chaucer,

Get someone to explain what I wrote above.  You obviously do not understand it.
 

Offline Shutter

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Re: Flight Path And Related Issues
« Reply #3374 on: October 16, 2020, 09:11:11 PM »
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The crew was quoted multiple times in newspapers of having to adjust the trim due to believing Cooper bailed? might be in the 302's as well..the autopilot can be used multiple ways vs one option. if they adjusted the trim the auto was off. if it was on the auto does it. the document I post states it was on most of the time in WA. and further south..I still don't know what this proves..

Any change in the trim would be small regardless if it was done by the pilots or the autopilot.  Cooper, the money, the parachutes, and anything else he had attached to him would weigh about 225 pounds while the airliner probably weighed something on the order of 150,000 pounds.

Yes, the auto will make changes you don't feel. I'm going by what they said. as for the plane. pilots even feel jumpers going out the back of the DC-9. the plane was empty and wouldn't take much to shift it. they have to be careful while it's on the ground empty with people walking around inside or it tips. I'm not sure if the pilots in McCoy's or McNally's shared that. I recall the McCoy hijacking the pilots reported a howling in the cabin.
« Last Edit: October 16, 2020, 09:11:49 PM by Shutter »