Lockheed Skunk Works Active Sonar Stealth Submarine 

Fun Fact: Polaroid went into bankruptcy in 2008 and stopped making any film. But Fujifilm actually picked it back up and started manufacturing new cameras and new film for use. under their "Instax" line. And... they're actually getting popular again. Even as recently as 2016 they've been selling around 5 million cameras a year. I guess people miss the nostalgia or convenience of Polaroids. I know as a kid I always liked to shake them to get the film to develop faster.

- and it doesn't have to download an update that bricks the hardware after a month.

@@matchesburn One reason why Polaroid film was still needed is that it was used to take X-ray images by early bomb inspection equipment.

Where can I see one of the weird photos he descibes?

The was SubBase San Diego.... Auto correct....😔

@@JamezM74 I was gunna say that you must have made some damn good sandwiches if they let you on board the top secret submarine.

Then there was the flying sub in Voyage to the Bottom of the Sea.

That show was dope. Way cooler than space shows.

Darwin the dolphin was an absolute ladies man. Incredible show.

Air is also a fluid. :)

Just a shame the young guy in the show took his life at a young age.

@@briananthony4044 Aye 😔

Came here to say this

Stealth as in very quiet. 99.9% of detecting a sub is done by *passive* sonar and this is a noisy design choice by default.

I had wondered what happened to it as I’d forgotten about it until this story

Sea Shadow belongs in a museum.

Drach is a scholar, this dude is a layman. Both are excellent sources.

Yes drach is a very smart person

@@shanepatrick4534 With over 20 years service on sonar,!

Battleship New Jersey deserves a mention as one of my favorite naval history yt channels. They've been putting out a lot of great content the past year.

@@rickjames8317 yes he is good for sure. He has another flavor vs drach

Ah, found an excerpt online - "I had a couple of our engineers buy a small model submarine, put faceted fairings on it, and test it in a sonic chamber. Even with such a crude test setup, we discovered that we had reduced the sonar return from that model sub by three orders of magnitude. So we decided to design a stealthy sub; the cigar-shaped hull was shielded by an outer wall of flat, angular surfaces that would bounce sonar signals away and also muffle the engine sounds and the internal noises of crewmen inside the vessel. We ran numerous acoustical tests in special sound-measuring facilities and obtained dramatic improvements. If nothing else we had rendered null and void the favorite cliche of a lot of World War II naval action movies about a submariner sneezing or dropping a monkey wrench at the critical moment when the enemy destroyer’s sonar search pings ever closer. The flat outer wall effectively eliminated any noises." “Skunk Works” by Ben R. Rich

Super duper missiles?

If they are even told about it 😏

I think the example I am thinking involves twitter, a cell phone camera, and classified satellite imagery

@@4thzone697 duper duply dupy?

What a idiot ! We know what its doing for some time . What we need to know is what information they have !

BAL: You are 95 percent correct. It is extremely unlikely they would be openly placing taps on commercial cables. The Soviets/Russians have spent decades mapping out sea cables in preparation for war and the ability to cut them. Cables are typically NOT intentionally buried, except in areas with strong scouring bottom currents, due to increased cost, complexity. The Soviets used to practice cutting old Czarist telegraph cables. (old sea dog with some undersea cable familiarity).

Idk how difficult it would be, afaik they dig trenches for the cables to lie in. Probably "just" need to find the trench? Theres also ways to tap cables without damaging them, eg with passive sensors on the outside of the cable.

@@termitreter6545 not much to gain the probability of finding any useful info I out of those commercial cables is like finding a needle in a haystack. Every second there billions of gigabits of info going through it . The cables themselves are huge about the same dia as a telegraph pole. Muck better find map where they are at in case I have to cut them some time in the future.

Yeah, it’s pour-shuh not Porsche. People get so offended when you say their name wrong but then endlessly butcher the history books and manufacturing names.

Need a low tech way to check the airflow on a car or plane? Tape lots of bits of string to it. Need to check the return on a stealth plane test model? *Big tank of bats and then count the clonks.*

It looks like early artists' impressions of the "F-19".

thank you for the update.

Sound would have a wavelength half as long as the screws, that’s pretty short

One would hope they were being as sneaky with that gasket material as they were when they fed Russia false info about the rubber compound used for the tyres of the Concorde. Stuff turned into chewing gum when it got hot enough. Joke's on us though, the Russians were later given a carefully-overseen tour of the manufacturing facility and their diplomats wore shoes given to them by the KGB with special gummy rubber shoes in order to pick up the metal shavings from around the mills to take back to Soviet metallurgists!

Perhaps...perhaps we did, sir? Do you prefer tea or coffee?

Active sonar is very much over rated. Water conditions are not always favourable and anechoic treatments reduce the echo. As with radar, the echo reduces by the fourth power of range, so you need to be quite close. If you have a quiet submarine (eg RN Astute or USN Seawolf) you are probably revealing your presence / position, your target will learn a lot about who is engaging him and in exchange you just confirm the range that you have already derived using passive TMA. In my experience, we only transmitted in exercise conditions and that was mainly so that we could check that the Transmit Key (yes I mean a physical key like your car key) was still where we left it “last year”. I have heard that some captains liked to surprise Boris with a few transmissions as they broke trail. Turning to your flank array idea, I am not sure I’ve understood it correctly, but I’ll try to illustrate some of the problems. The flank arrays you talk about are passive arrays; in theory, you could make them active, but given the previous paragraph, why would you? Secondly, why would you try to triangulate the range when you can just measure the time between transmission and echo returning ? I think that there might be some value in triangulating passive tracks provided that they are close (