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RE: [PSUBS-MAILIST] Prone position tips?
Alec,
The issue with the prone position that is maintained for any length of time is that to breath, you have to lift a significant portion of your weight. Sling suspension from the shoulders and hips is one solution but would be difficult to get into in a typical PSUB. The Germans did quite a bit of research on this issue for several small jet fighters that would have required the pilot to fly in the prone position, have some diagrams someplace that I will try to find. They worked out the optimum angles for the body and included a head rest.
R/Jay
-----Original Message-----
From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Jon Wallace
Sent: Monday, October 26, 2009 1:56 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Prone position tips?
No personal experience here Alec, but I do recall Phil saying that prone was one of the most uncomfortable positions to use. Sufficient padding should help, but even when I'm lying in bed watching TV on a nice foot thick mattress I often find myself turning from stomach, to side, to stomach, etc, etc, etc. The only position I can think of that should help (although you may not have the room for it) is to have the torso slightly higher than the thighs and shins. I think Phil talked about this too, that to be comfortable you have to get the weight off your belly. So imagine sitting in a chair, and then pivoting face down 90 degrees while maintaining the same position. Your torso is at one
level, your shins at another. Obviously you need depth for your thighs
and shins to do this although I'm sure that can be variable.
0---\
\----
Jon
Smyth, Alec wrote:
>
> Hi all,
>
> Snoopy started a winter rebuild last night and will hopefully emerge
> quite changed, configured for two with one person lying down and the
> other sitting in the tower. But even with a 30 second test lying down
> in the stripped out cabin I can tell the person in the prone position
> will need an advanced degree in yoga and series of painkiller shots.
> Does anyone have some ergonomic lessons learned for prone crew? It may
> be as simple as making a cushion standard equipment, or maybe I could
> try to build a sort of folding table-like device in front of the
> viewport so that a person could rest their chest on it. Since prone
> positions are fairly common, I'm just wondering what folks have found
> works best (or at least hurts less).
>
> Thanks,
>
> Alec
>
>
>
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