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1
DB Cooper / Re: Suspects And Confessions
« Last post by TechnicalTim on Today at 12:14:37 PM »
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The titanium could also be from the medical field could it not?

Yes, a longtime friend of mine is a electronics wizard. I showed him several elements listed on Kaye's site and was told to look in the medical field due to some of the elements being radio active..
 

 We can certainly put pure titanium and titanium-palladium alloy into the medical field, titanium-antimony we can't.
2
DB Cooper / Re: New Forum & News Updates
« Last post by Chaucer on Today at 02:49:34 AM »
Hmmm…to the best of my knowledge the person referred to in the TTY as “SEADD” has always been assumed to be Flight Dispatch out of Seattle. In fact, I think it’s listed as such on Sluggo’s site. Do you have more insight?

EDIT:  just checked Sluggo’s site and SEADD is Flight Operations, not Flight Dispatch. Apologies for the error!
3
DB Cooper / Re: New Forum & News Updates
« Last post by Robert99 on Today at 02:10:37 AM »
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I think my post was pretty clear, Robert.

Edit: Oh, I see where you’re going with this. I said “transcript” instead of “ARINC TTY”, right?

Chaucer, to the best of my knowledge there is no indication of any flight dispatcher being involved in the flight from SEATAC to Reno.  And there was no need for one.
4
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Chaucer on Today at 01:16:15 AM »
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Watch the video I posted..
Watched this a couple times before. Watched it again. Makes more sense the third time around.

Still find it curious about Anderson saying that the gauges were indicating a “disruption in the airflow”. That doesn’t sound like an issue with the internal pressure in the aircraft to me, but what do I know?
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DB Cooper / Re: New Forum & News Updates
« Last post by Chaucer on Today at 01:14:25 AM »
I think my post was pretty clear, Robert.

Edit: Oh, I see where you’re going with this. I said “transcript” instead of “ARINC TTY”, right?
6
DB Cooper / Re: New Forum & News Updates
« Last post by Robert99 on Today at 12:32:17 AM »
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Bruce,

Quick question:

Do we know the name of Seattle Flight Dispatch on the night of the hijacking? They are identified as "SEADD" in the transcripts. Thanks much.

Chauc

Pardon me for butting in, but where is any Flight Dispatcher mentioned in the radio transcripts?
7
DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Bruce A. Smith on Today at 12:02:57 AM »
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Persistent pesky questions about them stairs and the oscillations and bump...

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...going down a couple of steps past that hinge point is going to lower the stairs enough to create pressure changes in the cabin that would be noticeable in the cockpit cabin altitude instrument...     ...this time, he goes way down the steps as far as he can, perhaps to the very end of the stairs, and jumps.  Cooper's weight on the stairs will not lower them to the same degree as they are lowered on the ground.  But when Cooper steps off those stairs they slam up into their closed position but don't lock there...     

In that clip from the Treat Williams movie, when the stunt guy jumps off the stairs, they retract very slightly and slowly. They certainly don't 'slam' shut, even momentarily. I would imagine the pilot could feel a bit of change on the pitch influence, but I don't see it re-sealing the cabin momentarily and causing a pressure event. For the stairs to behave in the way described, I would guess that Cooper would have to have pulled the emergency release, which should disconnect them from the hydraulic system and allow them to free-float. But I'm told that did not happen, that he did not pull the emergency release. So would there be that much variable from plane to plane, how much the stair door would be able to move while still connected to (dampened by) the hydraulic system?  ...??
I don't have a good answer for that either. I have heard different things - the stairs hydraulics were not deployed and the stairs were freefloating and vice versa. Regardless, it seems that the pressure bump was simulated during the drop test in January 1972.

Here is what I do know:  the cabin rate of climb and descent gauge uses a sensor in the cabin to measure cabin pressure altitude. During an unpressurized flight - like the Cooper hijacking for example - it will read approximately the altitude that the aircraft is at. It will respond just like the flight altimeter - going up and down with the aircraft.

I propose that the 727 was experiencing what's known as a phugoid.

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If the plane was experiencing a phugoid, that would be reflected as oscillations in the cabin rate of climb indicator. I think the slow extension of the airstairs by Cooper caused phugoid oscillations in the aircraft that the crew noticed on the gauges. When Cooper jumped, the crew experienced a pressure bump - a rather well-known phenomenon in aviation when the pressure of the cabin increases dramatically - that usually causes your ears to "pop". When that happened, the airstairs were no longer descending and the aircraft stabilized from its phugoid.

Thus, while both phenomena - the phugoid oscillations and the pressure bump - were caused by Cooper's behavior on the airstairs, they were distinct things. Whether the crew, the airline flight ops, or the FBI understood the difference when it happened or immediately after is the question.

 and a longer mode called the phugoid.



But the phugoid simply cannot explain the cabin pressure altitude oscillations or the bump when the stairs hit the fuselage when Cooper jumped.  It is just not possible.

Chaucer, the above is not an insult.       

Regardless, isn't important thing here it gave us the time of his jump?  Obviously it does not give the position of the aircraft in relation to the Victor 23 path in the sky?  That is what needs to be solved.   It could give a better location, or more confident one to perform another land search with metal detectors?  They sure brought in some high tech devices at Skinwalker ranch.  I wonder if any of that could help?  I wonder what Brandon Fugal thinks of this case?

Why don't you ask Brandon Fugal? I'm watching the "Secret of Skinwalker Ranch" on Amazon Prime.
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DB Cooper / Re: New Forum & News Updates
« Last post by Bruce A. Smith on Today at 12:00:35 AM »
Hmmm. No.
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DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Shutter on August 10, 2022, 06:59:29 PM »
Watch the video I posted..
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DB Cooper / Re: Clues, Documents And Evidence About The Case
« Last post by Chaucer on August 10, 2022, 06:11:20 PM »
But Rataczak reported the oscillations on the rate of climb indicator (VSI), not the cabin altitude. So they function in a similar manner?
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