[PSUBS-MAILIST] introduction,my self

[Alec Smyth via Personal_Submersibles]

Hi Roberto,

I really like your motivation! The project sounds a lot like the old
Galeazzi observation chamber. Here is a photo:
http://www.divingmuseum.org/wp-content/gallery/exhibits/picture-019.jpg

The one thing I would point out is that your visibility of the bottom,
through the dome, will be very limited. A K-250 style dome has good optics
looking through the apex (i.e. straight up at the surface) but really bad
visibility when looking sideways out of the edge. I suspect it is because
these are blown domes and therefore not of constant thickness. But the
bottom line is horizontal visibility through a K250 dome is terrible and if
you can, I would urge you to consider flat viewports instead.

If going to all the trouble of building this, it would seem you are only a
few steps away from making it into a complete K250.


Best,

Alec

On Sat, Nov 8, 2014 at 9:52 PM, roberto alvarez via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi, thanks for the info,  i live on the baja california peninsula, on the
> sea of cortez side, here the black market of the swim bladder of the
> totoaba mcdonaldi  an endangered fish is devasting the population
> this fish live at the 50 or more meters as grouper but also migrates on
> groups, each pound is valued ay 300 dlls aprox,  the panguero just remove
> the bladder from the female, , add some weight and send it to the bottom,
> i will use the submersible to document this as will be safer stay at 50
> meter on a sub than on scuba
>
> My concep is a powered capsule, now on an egg made with 3/16 A36, one
> outer shell and 1 inner shell, will have 8 reinforcement rings at 6 inch
> ( 36 in diameter and 45 inch between bulk heads, hemispherical or
> cilindrical shells ( based on what is cheaper ) i calculate 400 pound of
> lead, so will add concrete on the center area to reduce lead and make ir
> more stable as will travel or dive vertical, based on the acrylic viewport
> design i calculate 24 inch in diameter and 1/2 inch inch tick for the 150
> feet range, at first will made a solid top shell with an small viewport for
> install a camera and have the info on screen,also will install imaging
> sonar transducers for the external
> i attach a picture if my concept and calc ( float level,volumen,weight and
> pressure at 50 meters)
> may be some one build this before, will design to 250 feet to be safe at
> 150,
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20141108/dda6cc04/attachment-0001.html>