India's Own Kaveri Jet Engine Clears Trials in Russia, 'Ready' to Power Stealth Plane

Good news!

India's Own Kaveri Jet Engine Clears Trials in Russia, 'Ready' to Power Stealth Plane | Vantage | 4K - YouTube

Indonesia's coastal erosion crisis triggers $80bn seawall bet

Is this necessary? Will this work?

"Indonesian President Prabowo Subianto is reviving an ambitious, long-stalled plan to build a 500-kilometer seawall to try to protect communities from accelerating coastal erosion in the economic powerhouse that is Java, the world's most populous island. A September 2025 presidential regulation designated what was dubbed the "Giant Seawall" a national strategic project at an estimated cost of $80 billion. If the undertaking can surmount engineering, financial and political issues, Indonesia will have built the world's longest seawall."

Indonesia's coastal erosion crisis triggers $80bn seawall bet - Nikkei Asia "Prabowo revives grand 500km wall plan; Java villages, businesses sink as waves encroach"

Will the Thai Canal finally be built? How eager is China? Will Japan support it?

I must admit either I forgot or I never heard of this major civil engineering project that could well compete with the Panama Canal or Suez Canal!

"The Thai Canal .. also known as the Kra Canal ... or the Kra Isthmus Canal ..., is any of several proposals for a canal that would connect the Gulf of Thailand with the Andaman Sea across the Kra Isthmus in southern Thailand. Such a canal is suggested to significantly reduce travel times through heavily-navigated trade routes.

The canal would provide an alternative to transit through the Strait of Malacca and shorten transit for shipments of oil to Japan and China by 1,200 km. China refers to it as part of its 21st century maritime Silk Road. Proposals, as of 2015, measure 102 kilometres long, 400 meters wide and 25 meters deep. ...

A canal through the Kra Isthmus, which would shorten shipping times around Asia, was suggested as early as 1677. Thai King Narai asked the French engineer de Lamar to survey the possibility of building a waterway to connect Songkhla with Marid (now Myanmar), but the idea was discarded as impractical with the technology of that time. ..."

Thai Canal - Wikipedia

Credits: Thailands Jahrhundertentscheidung

Source

Horror moment China bridge collapses in cloud of dust just MONTHS after opening

How did this happen? Shoddy work? Poor planning? Wrong site?

How the world’s largest underwater tunnel is being built between Denmark and Germany

Amazing stuff! Danish engineering! Viking spirit! 😊

Rotating detonation ramjet engine for hypersonic speeds to fly in 2025

Amazing stuff! Will civil aviation be taken to the next level? What is the boom, if any?

"... A case in point is Venus Aerospace's new Venus Detonation Ramjet 2000 lb Thrust Engine (VDR2). ...

Unveiled at the recent Up.Summit in Bentonville, Arkansas the VDR2 looks ridiculously simple in a cutaway view because it's essentially an empty tube without moving parts. This is because it's mainly a ramjet, where the incoming air is compressed by the speed of the engine moving forward instead of by spinning turbine blades as in a conventional jet engine. ...

The VDR2 takes things a step further by incorporating a Rotating Detonation Rocket Engine (RDRE), which overcomes the limitations of a rocket or jet engine by using another novel principle – again, with no moving parts. The RDRE part of the VDR2 consists of two coaxial cylinders with a gap between them. A fuel/oxidizer mixture is squirted into the gap and ignited. The next step is a bit tricky, but if the detonation is configured properly, this generates a closely coupled reaction and shock wave that speeds around inside the gap at supersonic velocity that generates more heat and pressure. ...

It has the high thrust and efficiency needed to power an aircraft to speeds of up to Mach 6 and an altitude of 170,000 ft (52,000 m) [conventional civil aviation planes fly at about 9,000-12,000 meter altitude] and is 15% more efficient than conventional engines, if Venus Aerospace meets its current design goals. ...

The VDR2 is expected to make its first test flight in a test drone next year."

Rotating detonation ramjet engine for hypersonic speeds to fly in 2025

The unique undersea road tunnels and other road tunnels that link the Faroe Islands

Recommendable! Societal cohesion by tunnels! The undersea tunnel is about 11 km long. They plan to build an even longer undersea tunnel to connect islands.

Perfect place to develop tunnel vision! Pardon my bad joke!

Baltimore bridge controlled explosion: army blows up collapsed section

What took so long!!! It is now almost two months after the accident!

I don't believe they waited that long with the clean up with the World Trade Center after 9/11/2001.

Engineers put Leonardo da Vinci’s bridge design to the test

Amazing stuff! I never get tired to learn more about the genius of Leonardo da Vinci!

He even considered earth quake damage in his bridge design:

"He also apparently understood that the region was prone to earthquakes, and incorporated features such as the spread footings that would provide extra stability. To test the structure’s resilience, Bast and Xie built the bridge on two movable platforms and then moved one away from the other to simulate the foundation movements that might result from weak soil."


The bridge is held together by compression and gravity only!


Engineers put Leonardo da Vinci’s bridge design to the test | MIT News: MIT engineers have analyzed a bridge design proposed by Leonardo da Vinci, and found that it would indeed have stood solidly, had it ever been built.