The smoldering firewood burst into flame.

It's not good stuff, and it's from inefficient combustion, not from combustion itself.

Oxygen is needed for combustion.

With the heat of our covenant still smoldering comes worse

The internal combustion engine is not sustainable.

Spontaneous human combustion is rare and scientifically unexplainable.

Any common denominators in cases of spontaneous combustion?

So this is our internal combustion engine for creativity.

What about the internal combustion engine, which was invented in 1879?

Pollutants like this derive mainly from the combustion of fuel in car engines.

Carbon monoxide is a poisonous substance formed by the incomplete combustion of carbon compounds.

The internal combustion engine took off because weight mattered, because you were moving around.

As a matter of fact, I invented the combustion engine and the twoway nappy.

From playing with it, they learn some basic principles about fire, about intake, combustion, exhaust.

Atmospheric explosions, or full combustion, takes about 15,000 times longer than what happens in your car.

And if you've been in that part of the country, this is what those piles of burning, smoldering coal waste look like.

If you put that same fuel in an internal combustion engine car, you get about 20 percent efficiency.

There have been hundreds of millions of internal combustion engines built, compared to thousands of Stirling engines built.

But after the Stirling engine, Otto came along, and also, he didn't invent the internal combustion engine, he just refined it.

So it's the same idea as a jet engine, it's just the heat source was the reactor rather than the combustion of fuel.

Anybody who's trying to sell you biofuels, or this kind of thing, what do you do about the thermodynamic inefficiency of combustion engines?

and we're making great progress for this goal is to have a propulsion system based on hydrogen and fuel cells, designed and validated, that can go head to head with the internal combustion engine we're talking about obsoleting the internal combustion engine and do it in terms of its affordability, add skill volumes, its performance and its durability.

The fuel cell looked great one tenth as many moving parts and a fuel cell propulsion system as an internal combustion engine and it emits just water.

lots of little ways in lots of little places, is by copying the ancient Amazon Indians who made good agricultural soil by pyrolizing, smoldering, plant waste, and biochar fixes large quantities of carbon while it's improving the soil.

And when you allow the proper chemical reactions or the proper combustion to take place, what it does is it expels gases, ultra high velocities out the back of your rockets.

Well, that's great for roasting marshmallows, but then when you get to high school chemistry and you're studying combustion reactions, all of a sudden you understand why oxygen is needed for fires.

But, in any event, if you can burn it with the same efficiency because it's external combustion as your kitchen stove, if you can burn any fuel, it turns out to be pretty neat.

Then instead of a burner here that would be injecting fuel, like a combustion system, you would have this heat exchanger with a reactor. It would make the air hot, then the air would exhaust through the turbine and make thrust.

(Laughter) is the energy from the sound via the air and gas molecules is influencing the combustion properties of propane, creating a visible waveform, and we can see the alternating regions of compression and rarefaction that we call frequency, and the height is showing us amplitude.