Everything should be open for debate.
The window is closing with living witnesses to the crime. key factors need to be answered to come to any type of solid conclusion on multiple things surrounding the case.
We have reports of Cooper possibly jumping near Scholls airport. this was based on a radar operator working that evening. then you have the transcripts and crew statements conflicting with the radar operator.
The terminology differs in statements compounding the problems.
When dealing with wind, altitude, pressure, speed etc. a chain of events can occur.
We know the plane was not pressurized prior to taking off from SeaTac. the air pressure in the plane should be different from outside at higher altitudes. any breach should be notice either by physical evidence or electronic evidence (gauges)
A series of events should of taken place prior to Cooper's exit.
#1 A noticeable change when the stairs dropped. negative pressure should of left the plane and then the pressure equalized soon after. the air is thinner the higher you go. take a tube of toothpaste, squeeze it while opening the cap. the toothpaste would act like the air escaping out the back of the plane.
#2 The stairs dropping further due to weight on the stairs. this should also disrupt the airflow wind would come from the bottom around the stairs in vortex pockets causing fluctuations in the airflow. some might agree it could be called Helmholtz Resonance. this can be demonstrated by blowing over the mouth of a bottle.
#3 Once Cooper takes the Nestea plunge the stairs retract, almost closing pushing air into the plane. this would be the most violent of them all making it's presents known physically as well as on the gauges, and statements of a thud making sound part of this single event. this will also be a quick event similar to the stairs dropping when opened. by the time it shows on the gauge and the popping of the ears, the event had already passed.
To simulate this event, one could say the cracking of a window would be Cooper on the stairs. air rushes in and out at different frequencies until they match. everyone in the car would know a window has opened. once you close the window this would also be noticed and would be over causing a disruption in sound. each car is different based on how airtight the car is.
To stop the noise from the stairs they would have to open something else to stop the disruption. even the cracking of a window has arguments with terms. some say it's the Helmholtz Resonance, while other claim it's window buffeting..terminology also used is "air thump."
These are different events that will have different effects. they focused on recreating the most violent occurrence they spoke about. "the biggest bump" the term is not important. Rataczak calls it a fluctuation of air pressure.
I'm not really sure any dialog is missing in reference to when they believe Cooper left the plane. documents show both events occurring one after the other. it doesn't have to mention correct terms. If events 2 and 3 happened in close proximity which sounds like what possibly could of happened then the time on the transcripts could be the location of exit.
Anderson statement.
I monitored the gauges and reported to Captain Scott. We all agreed that the gauges were detecting a disruption of airflow, most likely caused by Cooper testing out the aft stairs. But we all felt one physically distinguishable "bump" with our ears which came abruptly after we had been monitoring the gauges. We all felt it almost in unison, surprised, "there he goes!" It was the largest bump by far, an abrupt pressure change. We all thought he had exited the aircraft at that point, because the gauges never detected any further major airflow disruptions after that ‘thud’. The re-test duplicated the oscillations and the pressure bump exactly.
They were already looking at the gauges and determined Cooper was on the stairs. (event 2)
They describe the bump as the largest. this is event 3. the stairs going back upward pushing air into the plane and everyone onboard knew something happened different from event 1 & 2.
Again, we have Cooper possibly taking a little time to get to the bottom of the stairs and then jumping soon after. they were reporting the movement of the stairs on the transcripts and conclude the jump took place soon after the movement of the stairs. a 302 has quotations of what was said that is different to the transcripts we read. they mention the ears and two events back to back. "no further major airflow disruptions after the thud" here you have evidence that disruptions occurred the entire time the stairs were in free fall. they were aware of the difference between free fall position, the lowered position as well as when they retracted.
The re-test duplicated the oscillations and the pressure bump exactly.
Anderson was very specific in this comment. we have a picture of them with a man on the stairs. they called the cockpit and probably got a response of "yes, this is what we seen on the gauges. (oscillations/fluctuations)
The they drop the sled and the stairs retract and they report again, yes, this is what we felt, read, and heard. duplicating two different events to match what happened.
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