Hello Bob and Paul,
Thank you very much for your advice, it is very useful for me. Please
tell
me: the plan sale in the site Lake sub, is it a real plan? is it
serieuse?
are there some buy and construction succeed?
thank you again
Fanta
Bob Duncan <katsurencho@yahoo.com> wrote:
Yes, Metal Anomality Detector(MAD), the stinger on the tail of the P3. I
don't know about the uproar, i'm sure there was. The P3 can fly low and
slow, which has been an advantage. The disadvantage was that those 4 big
fans could be heard by the submarine miles away. Or even 2 big fans,
'cause
they often shut down one, and sometimes 2 engines to save fuel at low
altitude.
The British have or had (i really don't keep up) the Nimron, who's
disadvantage was that it couldn't fly so slow. Easy to overfly the
target.
It's more related to the 737 than a P3.
Technology has soared so fast over the years. I flew in P3's in the
early
'80's and Moffett Field is all NASA now, the Navy moved out. Sound
travels
so fast and well in water. It's the easiest way to detect something
underwater that has the potential to move. Every machine has a signature,
electric motors, shafts turning, people talking. Electronics usually put
out
some RF, even if it's very slight. People talking probably not part of
the
machine signature!!
You can have 2, 283 (i'm old, i think they call them 6Ltr) Chevy
engines
built at the same place by the same people, and they will have 2
different
signatures. The sound the crankshaft makes, the sound the pistons make.
Once
your engine is heard, it's signature is put into a computer, then when it
is
heard again, it is recognized, and distinguishd from any other 283
engine,
or submarine.
I was flying P3's when CWO Johnny Walker was still in business. The
Soviets just read all our top secret and any messages like reading a
newspaper. There is a movie about him "Family of Spies". During that
time,
the Soviets learned that we were detecting them by sound. So, they
started
making their subs quieter. It did make it more difficult, but not
impossible. Since then electronics have became far, far more
sophisticated.
I don't know how Russian ships are now (or other former Soviet
countries),
and it's by no means my intent to speak adversly of them. In the past you
could always tell a Soviet ship from miles away, if you see a giant rust
bucket on the water it was Soviet.
As i understand the new P-8's are suppose to start showing up at PAX
River
Naval Air Station (home of NAVAIR, Naval Aviation Test Center) next year.
Bob
Paul Kreemer <paulkreemer@gmail.com> wrote:
Bob, does MAD trapping mean hiding in magnetic anomalies? Sounds like
some
you've had some interesting experiences!
And wasn't there a big uproar over replacing the P3 with the 737 versus a
prop plane?
Paul
On 8/28/06, Bob Duncan <katsurencho@yahoo.com> wrote:
>
>
> Howdy
> Having been a P3 engineer at one time, VP-9, Moffett Field. You could
avoid them if there were MAD trapping. But, usually they listen in on
sonobouys.
> And the P3 is going away from the US Navy, the P8 is comming in soon,
P-8 is a Boeing 737.
>
>
> Paul Kreemer <paulkreemer@gmail.com> wrote:
>
>
> Yes, PSUBers should consider plastic hulls to help avoid detection by
> sub
hunting P-3 Orions. ;-) Regarding manufacture and use, this
cautionary
note from Dewey Mason sounds pretty informed on the subject:
http://www.psubs.org/faq.html#fiberglasshull
>
>
> Here are a couple of notes on cabin air from the PSUBS site. The cabin
pressure would increase more slowly if you could add only oxygen and not
air. And if your dive time is short enough you may not need to do
scrubbing
or oxygen replacement.
>
> http://www.psubs.org/faq.html#cabinair
>
> http://www.psubs.org/faq.html#lifesupport
>
> A lot of design decisions here... Like many more experienced members
> have
done, let me suggest buying some Kittredge plans. You can get the K-250
or
K-350 plans here: http://johnmaynard.tripod.com/
>
>
>
> take care-
> Paul
>
>
>
> On 8/26/06, Fanta < fanta590@yahoo.com> wrote:
> >
> >
> > Hello everyone,
> > I am doing some calculate on the paper about the air pression inside
> > of
the pocket sub.
> > If I use a tank of compression air for supply air to pilot, the
> > pression
inside of cabine up slowly, it need an system automatic depression, it
means: return the pression as 1 atm. Here, some one has an idea about
this
system? Please drop for me a plan or some idea.
> > The second problem is carbonic air is up and I want to filtre air.
> > Have
you some advices about this?
> >
> > I hear about sub spy of North Korean, base on information 3 years
> > ago,
its made by plastic !! diver very limit but low price and it is enough
for
past many stations control in South Korea. North Korea use this type for
infiltration to South Korea, Are there someone here have more information
about this type sub? I do interesting this because it is confortable for
poor amateur sub builder.
> >
> > Thank you very much
> > Fanta
> >
> > Love and Peace, God bless you
> >
> > ________________________________
All-new Yahoo! Mail - Fire up a more powerful email and get things done
faster.
> >
> >
>
>
>
>
>
> Tejas is a Spanish spelling of a Native Amerian word which translates
> to
English as "Friend". There was a Mexican territory with this name. But,
the
German settlers and other gringos came along and couldn't say it right.
So,
it ended up Texas.
>
> ________________________________
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>
________________________________
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