Hope you all had a wonderful day yesterday!
Talked to grandson, the Air Force ER doc who described an experience I'd like to share. He went through a series of G force testing which many of you may already know about.
First off, they wear a G suit so air pressures can be changed to protect the wearer. They are constantly monitoring the vision which I really didn't understand since he went from white vision to having red and green which disappear as to peripheral vision and then on to white circle surrounded by black. (Don't quote me on this--I made notes but I'm not sure my description is totally accurate.)
Went from resting G force to 6.7 Gs, to Rapid Onset with the suit inflated for 30 seconds with strain on lower muscles, then 30 seconds more which he described as "not fun". He made the observation that if he could hold his breath under water for a minute or more why couldn't he expect to transfer that ability and that it has something to do with the heart not being able to pump due to the pressure so blood loss to the brain means you're going to pass out after a few seconds. Maintained 6 Gs for 30 seconds with no vision loss.
Next-- Rapid onset to 9Gs for 15 seconds when he experienced the white circle with the black surrounding it. 7-10 seconds. The the F16 profile which is pulling Gs at varying levels, up and down as pilots would in a plane changing speeds and directions rapidly.
The next one is voluntary--pulling 9 Gs until you pass out which was 4 seconds with no suit. Woke up within 2 seconds and having no memory of where he was or why and who the people were around him. He was getting his memory back as they were talking to him. Reason to do this: Because he wanted to know what it felt like to black out and wake up so he could identify with patients who has passed out. They took film of this and if it's at all possible, maybe we can put it on.
Have a good day.
ps-One more thing. He said he was "dreaming" during the 2 seconds he was out and would have sworn it was much longer since the dream sequence would be as lengthy as what we experience during ordinary sleep time.