tyb
just about to start one too, have not picked it though
>>6417138
China Develops Groundbreaking Heat-Resistant Material For Hypersonic Weapon
At Mach 5 (3,836 mph), a hypersonic vehicle enters a dense atmospheric layer, the ambient gas undergoes not only density change, but also a significant temperature increase. This physical-chemical reaction is associated with the flight speed is converted into heat and chemical energy, which is a considerable heat barrier that had researchers around the world scrambling for new materials that could withstand temperatures far higher than the melting point of metal.
It seems that researchers in central China, studying hypersonic heat transfer, a subdivision of aerodynamics that studies gas motion laws, have developed a non-carbon-based heat-resistance material for hypersonic flight, according to the Global Times.
The lead scientist, Fan Jinglian from Central South University in Central China's Hunan Province, developed a composite of ceramics and refractory metals that can endure hypersonic flight at Mach 5-20 within the atmosphere for several hours, or temperatures of about 5,400 Fahrenheit.
Jinglian said the composite of ceramics and refractory metals makes the new material far more superior to Western technologies that use "traditional refractory metals and carbon-carbon materials."
She said the composite is like concrete cobble.
"Think of the ceramics as the cobblestones, or the pellets, and the refractory metals are like the concrete. In high temperatures, the ceramics will act as pellets that pin the refractory metals, so they will not soften and deform."
As a result, the material has a melting point higher than metal, but also important characteristics such as low density and high malleability, according to the Hunan Television report.
As of March, the composite has been used in aviation, space exploration, shipbuilding, and national defense products, Hunan Television said.
Over the past two decades, China has made enormous progress in upgrading its military capabilities. China launched its hypersonic program in 2009, and by 2014, began testing an experimental hypersonic glide vehicle - that could be operational by 2020.
We reported last month that Xiamen University, a public university in Xiamen, Fujian on China's southeast coast, successfully tested a hypersonic missile in Northwestern China.
Unlike American hypersonic rockets such as Boeing's X-51 Waverider, which rides on a hot layer of gas known as a "shock wave," the Jiageng-1 No.1 rides on two layers of shock waves, one underneath the rocket and the other in the air intake of its ramjet engine.
The new, groundbreaking composite material and the latest hypersonic missile test in China - exposes just how far the US is behind the curve.
https://www.zerohedge.com/news/2019-05-04/china-develops-groundbreaking-heat-resistant-material-hypersonic-weapon
many do not understand that plus the methodology using the rolling average's-that need's a re-do in the worst way.
>>6417188
fuck off