cardinalblack - Tumblr blog

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King Edward III sword & scabbard commission 2016

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What we’re actually thinking when we say, “Oh no, it’s fine” and reluctantly close our book.

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Petrus Apianus - Astronomicum Caesareum - Ingolstadt, 1540

volvelle - medieval instrument consisting of a series of concentric rotating disks, used to compute the phases of the moon and its position in relation to that of the sun

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Attire as it was and should be, oh well...

Viking dresses by Savelyeva Ekaterina

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College Valley, Northumberland

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How here’s a doozy  A fresh perspective on the simple act of covering up - not so simple after all...

Have you ever wondered why most navies cover the propellers of their new submarines while awaiting launch?

Simple: Acoustic profiling. 

You see, naval engineering is such a well understood science, a naval engineer can, with relative ease and relying on both technology and experience, determine the underwater acoustic resonance of a propeller while in movement simply by looking how the blades are shaped and how many are integrated into the design, enabling the profiling of the boat into a database to allow easier detection by passive sonar, since you no longer need to discriminate from normal underwater sounds to detect a submarine, and instead can simply look for a known frequency, making detection far easier for an enemy navy.

That’s why is highly surprising when in an official photoshoot navy/dock personnel completely fail to cover up the propeller, since all the design effort that goes into a propeller, almost all of it focused on making its detection harder, is thrown into the trash the moment you allow it to be photographed, like what the germans did recently with their newest Type 212 sumarine

Of course, many old submarines don’t abide to these rules, mainly because they use old propeller designs that are so well researched it’s just not worth it to cover them up.

Or simply because the propellers are so damn dirty it’s difficult to properly gauge how their design works.

Of course, detecting an modern submarine sailing underwater is still the hardest thing any navy can set itself to do nowadays, regardless of what they know or don’t know about the shape of a propeller, but anything than can help make this monumental task easier is extremely welcomed, so handing it over in such seemly innocent way is something professional navies USUALLY strive to never do. 

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Interior of the Doge’s Palace (1898). John Singer Sargent (American, 1856-1925). Oil on canvas.

Sargent has set his easel to face east and we can see, somewhat, Tintoretto’s Paradise along the far wall  – a massive painting measuring 22 x 7 meters. This is the largest surviving painting of that time period. The oval ceiling painting (located center) is by Paolo Veronese called Triumph of Venice and proclaimed the greatness of this island nation.

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the amazon rainforest

• creates 20% of the air we are breathing

• has 40% of the world‘s tropical forest

• holds 20% of the world‘s fresh water supply

and humans be like:

nothing.

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i found hogwarts today (at the john ryland library in manchester)

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Bro, it's like 4PM in São Paulo right now and all the smoke made it look like it's already night...city of ashes indeed.

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Cuteness <3 <3 

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Gotta love this!! (via 10+ People Who Said They Didn’t Want The Damn Cats | Bored Panda)

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(via Paying the price for breakdown of the country's bourgeois culture)

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Fantasy Music - Daydream Mix

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Bluetech ft. Lynx & Janover - To Mend