Ship's Locker: Out of the Closet

[Condottiere]

Foxholes (Military Tactic)

Today most modern armies still train their troops in entrenchment techniques, especially in using Foxholes in defensive positions.

https://www.youtube.com/watch?v=qol8-TRnqro

 

[Condottiere]

The Scientist That "Discovered Antigravity" Then Disappeared Completely - An Unsolved Mystery

In the 90's a seemingly breakthrough in theoretical physics would be met with some skepticism. After various experiments would make certain discoveries hard to verify, a key scientist's disappearance may have been at the core of figuring out what is going on.

https://www.youtube.com/watch?v=eS_rEzKdzBA


1. Super conductors.

2. Cold fusion - hot super conductor.

3. Exotic state of matter, syncing?

4. Spinning carbon nanotubed latticed bucky balls?

 

[Condottiere]

What If (Tiny) Black Holes Are Everywhere?

It’s fair to say that black holes may be the scariest objects in the universe. Happily for us, the nearest is probably many light-years away. Unless of course, Planck relics are a thing - in which case they might be literally everywhere.

https://www.youtube.com/watch?v=srVKjWn26AQ

Creation of black holes through parental disappointment.

 

[Condottiere]

There's another Milky way out there

As a species, we like to think everything about us is one of a kind, including the Milky Way Galaxy, but new evidence shows that yet again, we're not so unique.

https://www.youtube.com/watch?v=j8f-H1DAwZE


Metallicity.

 

[Condottiere]

4D Spacetime and Relativity explained simply and visually

Outro artist of the week: Nicholas Antwi (BMI), "Mysterious Synth Drum Beat"

0:00 - Why time is a dimension
1:43 - Speed of light was a problem
3:54 - How Einstein resolved problem
4:54 - Minkowski geometry
6:59 - What're world lines
7:30 - What's a light cone
9:19 - How simultaneity is relativity
10:51 - How relativity affects light cones
13:09 - Future video topic
13:35 - Course at Brilliant for further study

Summary:
How to visualize Minkowski four dimensional spacetime and relativity using light cones and world lines. These are three spatial dimensions and one time dimension in the universe. With these 4 coordinates, you could rendezvous with anyone anywhere in the universe. In fact these 4 dimensions can describe any event in the universe.

But how did the idea of time as a dimension come about? How can we best visualize these 4 dimensions? And what really happens when space and time start doing seemingly weird things when two objects move relative to each other?

In the late 1800’s, scientists had recognized that there was an inconsistency between two theories – Newton’s laws of motion, and Maxwell’s equations describing electricity and magnetism. The problem was the speed of light.

Maxwell had shown that light was a self-propagating electromagnetic wave. And his theory predicted its speed to be about 300,000 km/s.

The question was what would the measured speed of light be if the person measuring it was moving. According to Newton, this moving observer should measure a different speed, than someone who was not moving. The measured speed should be the speed of the person, PLUS the speed of light.

In 1887, Michelson and Morley devised a highly sensitive experiment to measure the speed of light in the direction of motion of the earth. They found that the speed of light does not vary at all, due to the motion of the earth. A resolution of this unexpected result came from Albert Einstein who proposed that Newton’s laws of motion needed to be modified. He determined that the speed of light does not change in any reference frame, and worked out the implications of this idea.

Einstein showed that observers moving at different speeds will disagree about distance and time between two events. In other words, they will experience space and time differently.

Hermann Minkowski realized that relativity is really a theory about the geometrical relationship between space and time, and coined the term "spacetime." He suggested an easier way to visualize these four dimensions - by eliminating one of the dimensions, and making the vertical axis time, but in terms of length.

Something not moving spatially would be depicted as a vertical line. This is called called this a world line for the particle.

A uniformly moving point would be depicted as a diagonal line on this graph because it would be moving in at least one of the spatial coordinates as it is moving forward in time. An accelerating particle would be a curved line. A light flash somewhere in this 2D space would spread in all directions with time. This forms the shape of a cone. So Minkowski called this a light cone.

A light cone represents all the future events in spacetime that the light reaches from its initial event A. An upside down cone is the past light cone, and represents all the past events in spacetime that reach Event A.

Event A can be you here and now. The points outside these two light cones are causally disconnected from event A, meaning they cannot reach or be reached by event A.

How does special relativity enter affect world lines and light cones. Two observers moving relative to each other will not agree on simultaneity. Each will perceive the other's light cone as being tilted such that their observations being different can be explained.

What this shows is that simultaneity is relative to the observer. There is no absolute simultaneity in the universe. But each observer sees and experiences exactly the same spacetime. And both will agree on causality. Causality is always preserved in a universe with a finite speed of light. I will have more details on this issue of causality in a future video.

https://www.youtube.com/watch?v=ZfR1Jc6Zglo

 

[Condottiere]

7.5 FK BRNO PSD - A pistol that performs like a rifle?

In this video we walk through the FK BRNO PSD pistol, discuss the 7.5 FK round, install a Holosun optic and then attempt to run the pistol as a rifle through 3 stages of a two gun match...with just that one gun for both rifle and pistol stages.

Can the 7.5 FK BRNO replace a rifle? Let's find out.

I may have neglected to mention that the FK BRNO PSD pistol itself was provided by FK BRNO with a small amount of ammunition. Additional ammunition was purchased by me directly, and there will be more content coming as well.

https://www.youtube.com/watch?v=lWgPV75BLHs


1. Two thousand feet per second.

2. Pop out barrel.

3. Seven and a half or ten millimetre; same magazine

4. Nine millimetre barrel, different magazine.

5. Obviously a candidate for a pistol carbine.

 

[Condottiere]

What Makes SpaceX's Suits So Good?

Created by the Hollywood costume designer behind Batmans’ iconic rubber six-pack, SpaceX’s snazzy new spacesuit pairs the bold lines of a couture tuxedo with the utopian optimism of vintage sci-fi.

How did they make it so trim? And is it really the same suit Elon Musk blasted into the inky void behind the wheel of his cherry-red Tesla roadster?

Join us today as we model the ultimate in wearable tech and learn what’s so special about SpaceX’s Astronaut Suit.

Back in May of last year veteran NASA astronauts Doug Hurley and Bob Behnken blasted off from Florida in a test flight to the International Space Station.

https://www.youtube.com/watch?v=h5IvjHRubp0


1. Emergency suits.

2. Pumpkin suits.

3. Acceleration chairs: more important than you might guess.

4. Touch sensitive gloves.

5. Tuxedoesque Mask.

 

[Condottiere]

Personnel (scaled) Nuclear Damper

Neutralizing radiation exposure.

 

[Condottiere]

Rai Stones: The Most Mysterious Currency in History

Thoughty2 (Arran) is a British YouTuber and gatekeeper of useless facts. Thoughty2 creates mind-blowing factual videos about science, tech, history, opinion and just about everything else.

https://www.youtube.com/watch?v=LpC_sVIQ4no


1. Cheese and ramen.

2. Gatticaesque: drug free urine.

3. Stone cold hard cash.

4. Bookkeeping seems a matter of public archiving - nothing new under the sun.

5. Inflation danger - finding a way of increasing the number of bitcoins.

 

[Condottiere]

Unexpected Discovery: Largest Rotating Structure in the Universe

Hello and welcome! My name is Anton and in this video, we will talk about a discovery of the largest spinning structure in the universe.

https://www.youtube.com/watch?v=WpDAQpzJPdM


1. Cosmic web.

2. Kickstart rotation.

3. Intragalactic web - would be like tides, currents, and trade winds, accelerating or hindering the speed of jump travel.

 

[Condottiere]

Genius or Bonkers? We Find Out If Drycycle Is The Future Of Cycling

This is the future of urban mobility. This is the answer to all of our problems. This is The Drycycle. This EAPC (Electrically Assisted Pedal Cycle) is, as far as legislation is concerned, a bicycle - and may just be the solution to the issues caused in urban environments by heavy, polluting cars. In this video, Si challenges Hank to the ultimate city cycling challenge to see if the Drycycle really is the future.

https://www.youtube.com/watch?v=9B0eXmbrBIo


1. Electrically assisted.

2. Environmentally protected.

3. Crash protected.

4. Won't take up much space onboard the starship.

5. With a stronger battery, you probably could carry a passenger, or a trailer.

 

[Condottiere]

This Plane Could Fly Underwater...

In 1962... the US navy had a submarine problem. Unknown threats under the sea that had become nuclear. The solution? the creation of a jet aircraft that could track and attack these iron beasts - an impossibly tall order.

This future plane needed to be able to find submarines fast, track them over the ocean, And believe it or not it needed to be able to hunt submarines in their own environment - underwater.

Hold your breath, because we are about to dive deep to explore the never built Convair Submerging Seaplane...

Since world war two, submarines defense had become a unique staple of war time efforts. Nazi U-boats had hunted allied convoys, and with the development of submarine launch nuclear cruise missiles, they now posed a grave threat on land based cities.

While submarine-hunting boats had been effective, the age of the jet engine provided additional opportunities that had yet to be explored. Perhaps a plane, with its ability to quickly fly over vast areas of the ocean, would be the idea submarine hunter-killer.

To tackle this deep water problem, the US navy commissioned four different studies into the idea of a submarine attack plane, with the winner to receive a grant for $36,000 for futher study, about 315,000 in 2021 dollars.

It was called the Convair and General Electric high-density seaplane. High density, because it would be able to go under the water itself. The plane would be 50.5 feet long, 15.39 meters, and have a wingspan of 39 feet, or 11.88 meters.

It would have three turbojet engines that would be waterproof and have the ability to seal when under the water. It would have a retractable hydrosky that would deploy for takeoff and landing, and it would have a little propeller on the underside of the tail that would allow it to move underwater.

When it comes to range, we need to clarify the difference between flying and underwater. It had a range of 300 to 500 nautical miles in the air, or around 926 kilometers, and a much shorter range of only 50 miles underwater or just shy of 100 kilometers.

For speed, it was capable of 225 knots, or 258 miles per hour in cruise, or around 417 kilometers per hour, so not as fast as a jet aircraft at all dispite having three engines. Underwater, it would only be able to move at a speed of 5 knots, or 6 miles per hour or 9.26 kilometers per hour. But before you think this is the slowest submarine plane you have ever heard of, keep in mind it could travel underwater for up to ten hours - before returning to base!

The plane would accomplish this by having air-tight engines, a closed-off fuel tank, and a crew compartment with an oxygen supply, with the rest of the plane flooding with water to go up to a depth of 75 feet, or 22 meters.

The idea was that when a call went out that a submarine was near, the plane would deploy off a boat and travel to the location rising up to only around 2,500 feet, or 700 meters above sea level, before landing on the water and diving below the waves. It would cruse underwater, deploy it payload up to 1500 pounds, 450 kilograms, before surfacing and flying home. Because of the weight of the weapon, and the ability to stay submerged for long periods, this plane would have been the perfect ambush craft for enemy convoys, as well as the submarine-hunting role.

There isn't much mention beyond these specifics as to how it would find a submarine in the shallow depths of only 75 feet, but we admit that this was a revolutionary engineering challenge at the time.

The design was shown publically in 1975 by Convair and General Electric and was worked on for about six months, in partnership with the institute of aeronautics and astronautics, and the US Navy beuro of weapons. However, the project seems to have sunk here, and not proceeded any futher than some water tests.

Its hard to say the exact reason why, but seemling this plane design was a jack of all trades, but a master of none - the plane wasn't a very good plane, with poor range and terrible speed. It was also a terrible boat and submarine, unable to dive deep nor go very fast.Perhaps if the engineers had been given more time they would have been able to work out all the kinks. We don't know for sure!

But I admit, the idea of a plane that can sink like a james bond car and then take off like nothing happened is an incredible idea. An idea that was just not possible for the powers in charge back in the 1960s. Althought we can totally imagine the look on the russians faces when they found out that this aircraft exists, and was more than capable for what it claimed!

https://www.youtube.com/watch?v=t9t_wFk0r_k


Droneable.

 

[Condottiere]

Why New Aircraft Engine Ideas Rarely Succeed

Aircraft owners and pilots often bemoan the lack of new technology in aircraft engines and complain--accurately--that most airplane engines are basically 1960s tech. But as Paul Bertorelli points out in this video, it's not for lack of trying. And it's not necessarily the new engine itself that fails to get traction, but the company's support--or lack thereof.

CORRECTION: The Rotax V-6 engine had single, not dual overhead camshafts.

https://www.youtube.com/watch?v=_k1TQGK3mZI


1. In theory, the alphabet range of drives would be standard, for most commercial spacecraft.

2. While the navies would commission a small run of customized engines and power plants for their important projects, you'd expect them to stick to standardized off the shelf designs for most other spacecraft.

3. While actual mass production costs of engines isn't mentioned in High Guard, beyond the ten percent class discount, it should be a lot larger.

 

[Condottiere]

The Unsung Hero of Hoth

This obscure vehicle has been hiding in The Empire Strikes Back under our noses from the very beginning. Unfortunately, this awesome little vehicle has only gotten minimal recognition. Time to change that!

https://www.youtube.com/watch?v=pa3vDAB47f4


1. Laser drill.

2. I've never figured out why laser drill would be inaccurate, considering they'd have a constant beam, which could pretty much follow a target and allow instant feedback.

 

[Condottiere]

Is Mycelium Fungus the Plastic of the Future?

Is Fungus the Plastic of the Future? Use the code "Undecided" to get CuriosityStream for less than $15 a year! https://curiositystream.com/Undecided. Plastic changed the course of manufacturing forever, but came at a cost. Mycelium technology might be the solution and the next big boom ... a plastic-like replacement with so many uses and new opportunities for products, companies, and profits. Let's explore mycelium technology and how it can help us achieve a more renewable and cleaner future.

https://www.youtube.com/watch?v=cApVVuuqLFY


1. I'm not too sure about using it for components that you want to last for years, if not decades.

2. I think for building materials, if it's for low storied building, it could be that the light weight would compensate for structural strength.

 

[Condottiere]

INVISIBLE SOLDIERS, AMAZING ISRAELI CAMOUFLAGE TECH || 2021

Polaris Solutions developed an innovative new material that provides multispectral concealment.

https://www.youtube.com/watch?v=sazcFKDhcSA

 

[Condottiere]

Hemp conversion to graphene and diamond. Smart carbon capture?

Hemp has been celebrated and vilified in equal measure over the centuries. It has fantastic properties for textiles and ropes, but it comes from the cannabis plant, so it arouses deep suspicion among some policymakers. What is unarguable though, is that it is an extremely fast growing plant that stores a large amount of carbon. So is it really possible to convert it into graphene and diamond in a sustainable, environmentally friendly way?

https://www.youtube.com/watch?v=AWwQGb5KWXM


1. Industrial diamonds.

2. Diamond hull armour.

 

[Condottiere]

Smallest Mini Aircraft In The World

To start flying can be very expensive. As the size of an airplane does affect the prices, we have a look at the smallest mini aircraft in the world today. All of the mini aircraft come with an engine and can be operated by a pilot. Some of the mini aircraft engine are in the ultralight aircraft category and some are even compliant with the Part 103 regulation which means you can fly those mini planes without a license in the US. We even found an insane small helicopter for the ones that are more interested in helicopters than in jet.

Would you fly a mini airplane? Tell us in the comments below!

TIMESTAMPS
0:00 Intro
0:19 Stits SA-2A Sky Baby
1:18 Cri-Cri
2:22 BD-5J
3:35 SD-1 Minisport
4:31 Starr Bumble Bee 2
5:19 McDonnell XF-85 Goblin
6:15 Gen H-4
7:04 CMC Leopard
7:49 Martin Jetpack
8:32 Jetpack Wingsuit

https://www.youtube.com/watch?v=9qBj8YsyvhQ


1. Tends to be mostly cockpit.

2. Eventually, you'll just take a large enough drone and add in the cockpit.

3. Parasite fighter.

4. You only live once.

 

[Condottiere]

P90: FN's Bullpup PDW

FN began developing the P90 in the late 1980s, actually preceding the NATO requirement that it would eventually compete for. The idea of the P90 was to develop a weapon for secondary troops to replace 9mm pistols and SMGs. There was an anticipated threat of Russian paratroops wearing armor that could defeat 9mm ball. The P90 was intended to be a light and handy weapon that was easily controllable without a tremendous about of training, and could defeat that sort of body armor.

The result was the 5.7x28mm cartridge, firing a 31 grain armor-piercing bullet at 2350 fps. This was combined with a simple blowback action and a Hall-style 50-round magazine in a fully ambidextrous, bullpup layout. The gun was introduced onto the market in 1990, and has been widely purchased by security and special operations organizations. In its original intended role for support troops, it has only been adopted by Belgium.

https://www.youtube.com/watch?v=M20PiFxMkrs


1. Personal Defence Weapon for support personnel.

2. Futuristic looking.

3. Likely armour piercing.

4. Popular with personal security and special forces.

5. Considering the short ranges and tight corners prevalent on spacecraft, should be ideal for ship security.

 

[Condottiere]

Surprisingly, Earth's Core Is Growing Larger on One Side, But Why?

Hello and welcome! My name is Anton and in this video, we will talk about new discoveries from the Earth core.

https://www.youtube.com/watch?v=MjXZihJ8o2Q


1. Crystalized iron nickel layer.

2. Snowing.

3. Core glacier.

4. Lopsided.

5. Energy exchange.

6. Indonesia - Brazil axis.

7. Honeyed glass.