And why can't an engine use the energy it produces to run itself?

A worn engine will use more fuel than a good one.

Now he started the right engine using bleed air from the left one.

Some engines use air or nitrogen as the working fluid.

An engine with a higher specific impulse uses fuel better.

Once created, the engine uses the item bank to generate a test.

Many engines use permanent brain as a method to increase their strength.

Why do some engines use a dry sump oil system?

With the fuel valve turned off, the engine used the remaining gas in the lines.

The engines, which must be lightweight, use a very rich fuel mix.