At 04:58 PM 1/7/2003 -0500, you wrote:
We are using a race-car style helmet support. Range of motion is not a major concern for us.>From: "John Carmack" <[EMAIL PROTECTED]> > At 03:46 AM 1/6/2003 -0500, you wrote: > >You're going to land someone eyes-down? > > > >Dan > > We are going to launch them eyes-out-- their back is on the top bulkhead in > the nosecone. This is probably going to be a controversial point in our > design, but there is some good reasoning to it. > > ... > > Especially with the desire to tailor the burn trajectory so that burnout is > at a very low dynamic pressure for an unstable vehicle, the launch > accelerations don't get all that high. Hanging from a harness (with hand > grips and knee-rests) at 2-3G isn't going to be tons of fun, but it isn't > even close to the voluntary limits listed in bioastronautics.Hanging and holding might be physically ok, but that's an awfully tough position for neck support. If you strap their head back, you've both limited their range of motion and action and removed flexibility that might be needed if the body shifts, and if you don't add support, you'll be dead-lifting from the neck up at 3Gs and likely to smash backwards on deceleration.
John Carmack
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