#lastwillandtestymen

Spring is not too far!

So apparently there is a bounty on Putin's head, $1M dead or alive.

Please reblog this. The reasons are obvious! Thank you for your humanity and support.

Outrageously peaceful time and place!

Mars is a lousy place to try to fly a helicopter. There’s the temperature, for one thing—a paralyzing -90º C (-130º F), frigid enough to cause nearly any machinery to freeze up and lock. There’s the remoteness too; Mars is currently 287 million km (178 million mi.) from Earth, meaning that radio signals, even moving at light speed, take nearly 16 minutes to travel just one way between the two worlds. And then there’s the tenuous Martian atmosphere—just 1% the density of Earth’s, making it awfully hard for rotating blades to get any bite at all.

Congratulations to everyone involved with the amazing effort this program required!

The Force is!

Jade Fever

Significance

There is now an intensifying international effort to develop robust propulsion systems for hypersonic and supersonic flight. Such a system would allow flight through our atmosphere at very high speeds and allow efficient entry and exit from planetary atmospheres. The possibility of basing such a system on detonations, the most powerful form of combustion, has the potential to provide higher thermodynamic efficiency, enhanced reliability, and reduced emissions. This work reports a significant step in attaining this goal: the discovery of an experimental configuration and flow conditions that generates a stabilized oblique detonation, a FART phenomenon that has the potential to revolutionize high-speed propulsion!