Re: [PSUBS-MAILIST] tank periscope optics

[Coalbunny <coalbunny@onewest.net>]

Ah yes, kinda like in the movie "U-571" (name?).  Loved the flic.  
Carl


Dan h wrote:
> 
> Carl, I must say, for that hidden swimming hole your referring to, I might
> also be looking for a set of prisms to build a periscope.  ;-)  Better yet,
> I'm building a two place sub, you navigate to the destination and I'll
> provide the periscope!
> 
> Seriously though,  Yes a periscope would be fun but as far as surfacing
> safely, a small view port in the hatch and your ears should let you know
> what's top side before you get there.  Granted, you won't know exactly, but
> to have a five or ten foot piece of pipe get whacked off the top of your sub
> by a passing boat wouldn't be fun.  The volume of the average PSUB is to
> small compared to a navy sub where periscopes are common.  Taking on ten or
> twenty gallons of water in a periscope accident would sink most PSUB's, but
> in a full size navy sub, it only calls for a mop and pail.  Like driving
> your car with your arms sticking out of the window.  It might be fun but not
> worth the risk in my opinion.
> 
> Dan H.
> 
> Coalbunny wrote:
> 
> > Dan, I have interest in the periscope issue as well.  I think it'd be
> > kinda nice to be 5-10 feet under and see what's on top.  large subs
> > aren't the only ones that could have surface boat problems.  You may
> > hear the prop wash off those that are moving, but what if they ain't?
> > What if they're sitting there in the water and the engine's off?
> > Liability problem.  Not cool.  Besides, I remember some of the swimmin'
> > holes the college girls had at Lake Powell, and they're well hidden....
> > :D
> > Carl
> >
> > Dan h wrote:
> > >
> > > Why would you want to use periscope optics in a sub?  I don't
> > > understand the advantage in using prisms to look around corners with
> > > when all you need is a piece of acrylic to keep the water out.  Even
> > > using cameras seems like over kill.  If the view ports are kept to a
> > > small diameter there not expensive.  Say, keep them to the size of
> > > plasma TV monitor and forget the electronics!
> > > One thing about acrylic, as long as you use the proper thickness for
> > > the depth your diving to, it always works.  No matter if you have a
> > > power failure, an equipment failure or an operator failure.  It's
> > > almost fool proof!  Isn't that one of the most important criteria in
> > > designing anything like a sub.  When life and limb could be hanging in
> > > the balance, simplicity and safety are usually the number issues in a
> > > good design.  Cameras and optics are fine as extras, but a hole in the
> > > hull filled with an acrylic disk as the main way to see out makes good
> > > sense to me.
> > >
> > > I spent many years designing mechanical systems. Several rules of
> > > thumb that kept me out of trouble (most of the time) were:
> > > Be efficient. Do many functions with one part rather than one function
> > > with many parts.
> > > Keep it simple.
> > > Where safety is a consideration, cover all the bases and take no
> > > chances.  Design in redundancies, if allowable.
> > > And lastly, design in some "wiggle room" to accommodate revisions and
> > > up dates.
> > >
> > > Remember K. I. S. S. !!!!!!
> > >
> > > Dan H.
> > >
> > > AndrePevestorf@aol.com wrote:
> > >
> > > > Hi,
> > > >
> > > > I yust remember the special periscope optic in a tank (BMP-1 or
> > > > T-55)
> > > > my recollection says that this prism are very heavy but also easy to
> > > > change... so I wondering if it could be possible to use some of that
> > > > for a sub...
> > > >
> > > > but the first question is:
> > > >
> > > > are there any legal ways to get such army stuff second hand ?
> > > > ( I know in former times it was possible to get a russian gun for a
> > > > bottle of wisky but thats not the kind of deals I´m looking for..)
> > > >
> > > > A.
> >
> > --
> > Watch your thoughts; they become words....
> > Watch your words; they become actions....
> > Watch your actions; they become habits....
> > Watch your habits; they become character....
> > Watch your character; it becomes your destiny.

-- 
Watch your thoughts; they become words....
Watch your words; they become actions....
Watch your actions; they become habits....
Watch your habits; they become character....
Watch your character; it becomes your destiny.