Re: [PSUBS-MAILIST] What's the biggest problem?

["Jeremy Crawford" <ISMASC@hotmail.com>]

I have aWatson industries FGM-301 Fluxgate Magnetometer surplus from nasa if
you are interested.  Original retail $1507 I would sell ALOT cheaper :)


specs at..

www.watson-gyro.com/PDF/FGM-301-99_Brochure.pdf

www.watson-gyro.com/PDF/FGM301.pdf

Jeremy



----- Original Message -----
From: "Alec Smyth" <Asmyth@changepoint.com>
To: <personal_submersibles@psubs.org>
Sent: Tuesday, March 11, 2003 1:07 PM
Subject: RE: [PSUBS-MAILIST] What's the biggest problem?


> ...depends on your definition of "problem!"
>
> In the narrow sense, my largest problem (so far!) was probably getting the
pressure hull to be really round. Off the truck, one end of the cylinder was
oval and the other was a teardrop. And as it was 3/8" thick, it was not very
easy to change its mind about its proper shape.
>
> In the a more general sense, the problem is the learning curve. Everything
I'm building, I'm building for the first time. That means that everything
just takes way too long. I've thrown out parts that took 18 months of to
make. My mill-drill is on its third motor since I started this project.
>
> My lesson learned, in case its of use to anyone contemplating their first
boat, is that if you have a custom, non-conventional design in mind, you
will probably get there faster by building a boat from plans first (say a
K-250) just for the educational value. Failing that, I think the smartest
approach is to invest about 3 years in getting your design to the greatest
detail possible before you actually order any material. OK, enough
philosophical ranting. I have to get back to eBay to try and find all those
confounded little parts I need for the VHF antenna/GPS antenna/fluxgate
sensor/motorized micro video camera, pressure-compensated periscope-mast
thingy that happens to be the challenge of the month!
>
> Alec
>
>
>
> -----Original Message-----
> From: Michael B Holt [mailto:tlohm@juno.com]
> Sent: Tuesday, March 11, 2003 3:14 PM
> To: personal_submersibles@psubs.org
> Subject: [PSUBS-MAILIST] What's the biggest problem?
>
>
> Something I read triggered a question: what's the biggest
> single problem facing submarine builders?
>
> It seems to me that, ignoring for a moment the fairly normal
> lack of enthusiasm we get from spouses, the biggest problem
> is the matter of the pressure hull.
>
> Comment?
>
> A related note that may have caused me to think about the
> question:  In Jan Breemer's book about Soviet submarines,
> he reports that the CIA found that the Golf they recovered
> was not well built.   From page 168:  "Hull thickness varied
> widely, and welds were uneven and dangerously pitted.   Most
> surprising was the use of four-by-two wooden beams for
> internal structural support."
>
>
>
> MIke H.
>
>
> ________________________________________________________________
> Sign Up for Juno Platinum Internet Access Today
> Only $9.95 per month!
> Visit www.juno.com
>