Now, he thought, if only the fuel will burn.

But the lower they flew, the faster the fuel would burn.

Above or below this ratio, the fuel will not burn.

Oxygen and fuel cannot burn without a source of ignition.

With the fuel still burning on the water, the hunt for a cause began.

As a result, the fuel cannot burn completely unless it has a sufficient amount of oxygen.

With more fuel to burn, the engine can create more power.

Theoretically, the fuel would burn even better in pure oxygen.

The fuel burned on water and could be used to set fire to woods and houses.

The solid fuel burned at so many inches per second.