Here’s some news that won’t be much of a surprise for some folks:
NASA has confirmed testing a mach-6-capable aircraft, nicknamed the Blackswift, which uses a pulse detonation engine system.
Sure enough, its shape is triangular.
This won’t be s surprise because hypersonic, triangular-shaped aircraft (whose contrail had a distinctive “donut-on-a-rope” shape) have been seen for years.
Cool stuff.
–James
I like how the anchor seems to think he’s watching real footage “Check that out! Did you see it leave the runway? It’s gone!”, when it’s obviously CGI.
The leftwing European in me thinks this is bad but my inner 9 year old thinks “cooooooool”.
How dumbed down do they have to make a science segment on Fox? Instead of burning fuel it blows it up! For god’s sake. Makes it sound amazing when that’s essentially how a car works.
How dumbed down do they have to make a science segment on Fox?
Somehow, the question seems to suggest its own answer.
–James
Gosh! 
djm
Stanisław Marcin Ulam/Freeman Dyson, Project Orion, Nuclear Pulse Propulsion.
Pulse detonation is capable of much higher velocities than commonly burning rocket fuel. If you want a dumbed down science section, try BBC. 
Interesting, but they are all going to be sitting in the car park when there is no petrol to detonate.
Mukade
Reminds me of Project Orion, a project in the 50’s which used nuclear devices to generate the pulse detonation. I had a coworker who was
obsessed with getting it reinstated.
http://en.wikipedia.org/wiki/Project_Orion_(nuclear_propulsion)
On a related note, apparently, DARPA has created a hybrid engine to solve
the problem of getting a scramjet up to speed so it can work…
Click here for the engadget article
Well duh? 
Two forms of explosions are detonations and rapid ordinary combustion. The explosion of gun powder and the explosion of fuel in an internal combustion engine are simply rapid combustion. High explosives such as dynamite detonate. When fuel knocks in an engine, it is detonating and the resulting shockwaves are not good for the engine. You want a whoosh, not a crack. In a detonation, a shockwave supplies the energy to light the fuel, the abrupt combustion adding energy back to the shock wave, keeping it going. In a pulse detonation engine, the fuel air mix is detonated repeatedly. Detonation waves are a remarkably efficient way to light fuel as you don’t have to waste energy compressing the air to get it hot enough to burn the fuel. Compressing air also compounds the heating problems at hypersonic speeds as you have to deal with air heated by compression before you even get it even hotter burning fuel in it. Getting the fuel air mix to detonate in the first place repeatedly at the right time is the problem. The B-1 buzz bomb used ordinary combustion that simply happened repeatedly, like in an internal combustion engine, so someone did not know what they were talking about at Slashdot.