Re: [PSUBS-MAILIST] My Sub design

[Dave Everett <deverett@idx.com.au>]

At 01:47 AM 12/6/2004, you wrote:

> Hello Dave,
>
> I like your design because it is basicaly simple. But there are three things
> that made me wander.
>
> First there is the acrylic dome. It is a big one with a special shape.
> Making it yourself is probably impossible and buying it costs you a fortune.

True. I read here recently about the problems with acrylic domes including 
the difficulty of manufacture. I would not make it myself.

I need to run some pressure sims on that shape. Not shown in the render is 
a frame that the viewport is built in to. The frame takes the stresses at 
the rear and top and runs down in a diagonal from the rear towards the 
front 3/4.

The main reasons for a dome are:
1. better visibility
2. If more than one sub is deployed you can have visual contact
3. Less claustrophobic
4. quick death if it fails

> The second point is that you might have problems looking at the bottom. You
> have to look through a 2 mtr. watercolumn. In The Netherlands you wouldn't
> see anything. I suggest that you add a viewport at the hight of your knees.

I have 2 solutions for this. on is a mirror, like a side mirror on a car 
but pointing down. As you say you would still be looking through 2m of 
water. The other solution is a fixed video camera.

> The third point is the vertical thruster. I have no experience but my common
> sense tells me that avoiding for example a rock or following a slope by
> adusting your trim is rather a complicated way to do so.

Good point. I can add a couple of vertical thrusters to the sub.

Dave Everett

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