| MAIN PROPULSION COMPONENTS | ||
To achieve the thrust needed to launch a rocket into space, a chemical engine must generate enough thrust to overcome the forces of gravity (weight) and drag. Scientists have developed many types of engines using both solid and liquid fuels to create just the right propulsion system to meet the goals of each mission. On the one hand, rocket engines are so simple that you can build and fly your own model rocket without much expense. On the other, rocket engines (and their fuel systems) are also so complicated that only two countries have ever actually used them to send humans into space. |
|
|
| 39 of 39 | ||