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I remember (dimly) the TAC crew who ran spin tests in the F4 back
around 1967 and then went around briefing crews. They came down to Homestead while I was going throught the F4 RTU. They described the flat spin and how finally they both ejected and neither ejection did anything to force the nose down enough to break the spin. They also said if the tail surfaces were about 8 feet further back from the wing recovery from a flat spin would have been possible. As for ejection sensations - FWIW a Martin-Baker H7 ejection isn't punishing at all. the only odd effect I noticed is that the powerful upward push and acceleration pulls your eyelids. As soon as the telescoping catapult tubes parted the powder gases dissipated, that hard push stopped and the lanyard-fired rocket took over. You can see again and you can hear the rocket hissing away. (Helmet soaks up the real noise) Looking down you can see the airplane apparently dropping below you - way below you - and the hole you just came out of. The rocket quits and you're still going up, maybe 250 feet above the airplane now. Then there's an audible click as the drogue chute deploys followed by a sudden yank as it fills and the seat is yanked up to coast butt-first into the airstream. (we were only at about 215 IAS at 1500 when I initiated the ejection sequence). One startling thing for me was that apparently something was awry, perhaps because ISTR I was slightly canted to one side) and the seat started to spin rapidly around the longitudinal axis. I remember thinking "If I have to go manual now this will be difficult . . ." thinking about manual seat separation and ripcord pulling. The spin was rapid enough to be quite disorienting. But then the main chute deployed and I was yanked firmly from the seat. It was all very cool from then on - I landed in blowdown and second growth following a hurricane about a dozen years before and the landing was so well cushioned my feet were about a foot above the ground when I stopped. Of course the early seats were punishers before a) pilots started getting back injuries and b) the physiologists and the seat designers got together and observed some design limitations inherent in homo sap, like 15 G was too brutal and 8G was okay. One comment - from the time I pulled the D-ring until the seat fired seemed about five full seconds. It didn't fire immediately and I started to look down to make sure I had the handle - dumb thought! but then my mind said "Don't look down - you'll hurt your back!" so I stayed erect and then the seat fired. This seemed to take about 5 seconds - according to the Dash One it's just 0.54 seconds from pull to fire. Shows how adrenalin speeds up thought in 'combat mode'. Walt BJ |
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