View Full Version : effect of high G force on vision

10-27-2007, 09:01 AM
Hello http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif I wonder if the blackout part of Il-2 is correctly represented. I seem to remember something about losing peripheral vision and it progresses until it all goes black. Is this true??

10-27-2007, 10:30 AM
Essentially yes. When the g's start to take effect in a turn, it's like you are looking down a tunnel in that your peripheral vision tends to close up (the sides are black and and you start to only see forward). It's not an overall experience (like looking through a cloth for example). It's still clear as normal down the middle, it just gets darker (and I mean total black, not just grey) to your extreme left/right.

Try to give an example: if you can see 180o (left, right, forward) normally, once the g's increase, that 180o gets shortened to say 140o (think of it like blinders on a horse. It can see straight ahead but not out to the sides. Eventually, its a short journey from 45o to passing out.

I speak from actual experience as a newb flying in an extra 300. I was able to take 4.5g's and my vision was about 40o (straight ahead and about 20o to each side of centre). I can't really say whether looking up was affected (I assume it was) as when I was flying, I was more concerned with straight ahead and to left/right as I was chasing (literally) another Extra. Naturally I couldn't look down (other than at my feet which didn't really help the situation).

Having said that, it's because the blood is rushing to your extremities (and not being provided to your eyes/head/etc. so you naturally shut down).

If you are able to force the blood back to those parts (basically you have to have great stomach muscles or a g-suit that prevents the blood from flowing where it's not beneficial), you can forestall that blackout and be able to tolerate higher g-forces (and be able to stay awake and not black out for higher loads). Naturally we can't do that in the game but hopefully, we as virtual pilots have that extra "oomph" built into the game coding-->ie we are pilots who are in great physical shape http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif )

10-27-2007, 11:08 AM
Thanks for the info http://forums.ubi.com/images/smilies/25.gif I wonder if Oleg would include the effect for BoB ? I think I will ask on 1C.