Re: [PSUBS-MAILIST] design challenge for a CAD expert

["Sean T. Stevenson"<sts@telus.net>]

Alec, I'm busy for a while, but as long as turn-around time isn't an issue for
you, I'd be glad to take it on.  Most of my experience has been with solid
modelling, as opposed to surfaces (NURBS, etc.), but I wouldn't mind a little
practice in that area.  I have done a little playing around with morphing solid
models of various NACA airfoils in Mechanical Desktop, and I am just now trying
to develop a comparable proficiency in AutoDesk Inventor.  My fee would be
nothing more than a test dive in this machine ;-)  This sounds like a good
excercise - just don't expect to see results in the next few weeks.

-Sean

>I have a little challenge here that is a volunteer opportunity if anyone
>would like to design a cool part that's a little beyond my present
>capabilities.
> 
>Background info:
> 
>My project is a 1 atmosphere  "flyer" with a collapse depth of 3K feet,
>roughly a la Deep Flight for those of you familiar with that sub (although

>on a very different budget and very low tech). This is a design in which
>hydrodynamics are important. Basically its somewhat like an aircraft, with

>wings amidships, V tail "ruddervators", and two thrusters astern. The
>thrusters are tucked in behind the hull, and will need intakes. I've
>completed the pressure hull. The wings, ruddervators, and thrusters are all

>on, and I'm just awaiting some custom connectors to finish the external
>wiring and tubing. 
> 
> 
>Here's the challenge:
> 
>I need to design a fiberglass fairing for the stern. I think this really has

>to be a 3D CAD effort, because compound curves, intakes, etc. make it simply

>too hard to visualize in 2 dimensions. If any CAD guru out there would care

>to take this on just for fun, I can provide 2D CAD diagrams of the
>underlying structure to be faired, as well as pictures of the actual built

>project. For inspiration I can provide detailed close-ups of Deep Flight's

>stern, although this design will be substantially different. Anyone who does

>this gets credit on the eventual sub homepage, but I'm afraid I can't really

>pay for the job. Incidentally, I do plan to eventually put all CAD diagrams,

>bills of materials, etc. up on a page for free... but only once the sub is

>known to work.
> 
> 
>Any takers?
> 
>Alec
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