Implosions are in the news but "no comment" here on the sad events this week, please. RIP to those fellas though.
It was 60 years ago (April, 1963) when the nuclear submarine
USS Thresher was lost due to implosion. They ultimately found it, torn to shreds and flat as a pancake, on the bottom the Atlantic in
8,400 ft of water.
Its maximum depth (collapse depth, below which its structure could NOT take the pressure) was ~2,000 ft. It sprung a leak, and due to other compounding issues, it flooded and sank beyond collapse depth (while its hull was still full of air, hence the implosion).
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Submarines are all over this thread.
The Thresher came to mind (I was alive, but a pre-schooler, so I have no memory of that event in real time) as it was a seventh grade science project (on buoyancy) years later.
I was fascinated to see pics of what was left (almost 300 ft long, 3,500 tons) after the accident .. looked like it went through a paper shredder. All hands (over 100) lost and none recovered.
But, implosions are not topic of this post. 200 years of warfare-capable submarines is.
A longish (45 minutes) video below depicts the six boats with
six (6) key technologies (author's opinion) that led to today's killer boats.
Starts
lower left with a one man, oaken "barrel" with a pedal-powered propeller, developed by US during Revolutionary War. The colonists' comparatively primitive warships could NOT hold a candle to the British boats (at the time the finest Navy in the world), so the "Americans" came up with a scheme to attach bombs to the hull of the British ships under waterline.
Didnt work, but the innovation was carry air IN the boat (called
the "turtle", 2 meters long) to stay submerged. 200 years later, that's what ALL submarines STILL need to do. STAY under water for a long time. The Turtle could only do it for an estimated 25 minutes.
Move up the chart the other innovations, along with other advances in weaponry, etc., and subs got physically bigger and bigger.
Top right, is the
USS Pennsylvania, an
Ohio-class boat, third largest ever made in the world, largest US boat ever made (177 meters long). It'll stay underwater for three months (limited only by amount of food for the crew it can carrry), nuclear powered, launched in 1989 and has YET (as of 2019) to be refueled, and has more firepower (nuclear missiles) than ALL the weapons used by ALL combatants in WWI and WWII,
put together.
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The six innovations (there are many others of course in electronics, metallurgy, chemistry, etc), and the first
combat boat to use it, are:
(1) Carrying onboard oxygen (to stay submerged)
(2) Maneuverability (bow planes, rudder systems, stabilizers, etc. to in essence "fly" underwater)
(3) Multiple on-board torpedoes (multiple kill potential without re-arming)
(4) Nuclear Power (basically never have to surface for fuel)
(5) Nuclear ICBMs (one boat, by itself, can level a whole continent)
(6) Stealth (super-quiet underwater)
Most lethal, dangerous, scary weapons platform humans have ever made. Kinda don't want bad people/rogue leaders to EVER get one of these pieces of heavy metal. A coupleof these boats on the loose could end life on this rock.
Anyway, the basics in long video and you'll learn/refresh what
200 years of key technologies submarines perfected to get their frightening, actually stunning/extraordinary capabilities.