Re: [PSUBS-MAILIST] My Sub design

[Thijs Struijs <thijs-struijs@planet.nl>]

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.
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.
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.

Greatings,

Thijs Struijs


----- Original Message -----
From: "Dave Everett" <deverett@idx.com.au>
To: <personal_submersibles@psubs.org>
Sent: Saturday, December 04, 2004 1:34 AM
Subject: [PSUBS-MAILIST] My Sub design


> I'm still keen to hear comments on my sub mockup at Moki.
>
> The hull is 1 metre in diameter 1 inch thick with a 2 inch bulkhead at the
> opening. The ellipsoid viewport is 2 inches thick.
>
> I originally planned to use a hemisphere but visibility was limited. The
> viewport would be fitted into a steel rim and hinge plate with protection
bars.
>
> I thought the fairing might also be able to be filled with air at the
> surface to add bouyancy and raise the hull a little higher in rough
conditions.
>
> There are no motors for vertical motion, I am wondering if some rim tanks
> are good enough to achieve good depth control or if I really do need those
> extra motors. I have a place for them in the fairing.
>
> Under the fairing would be about 9 tanks, each around 300mm long oriented
> vertically. Most would be connected together, a couple would be used for
> trimming.
>
> under the hull would be a large drop weight.
>
> The concept is to have the weight of the sub below the tanks, so it sort
of
> hangs in the water like a helicopter. I haven't made any studies of the
COG
> yet.
>
> Dave Everett
>


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