rocket , **
rocket engine

Today we made smoke and fire with a rocket engine yet again.

"You used to be able to buy anything down here, even rocket engines," he said.

For these reasons, rocket engines are only used when absolutely necessary.

The design of the rocket engine was almost identical to one built in Iran.

The same first stage rocket engines were used with some modifications.

The whole construction is simple and reliable; the rocket engine has no moving parts.

Shaped charges and rocket engines are similar, the official said.

However, there were indications that Iraq may have made ground tests of rocket engines.

Rocket engines produce the same force regardless of their velocity.

There are also some rocket engines and models which explain various aspects of space travel.