Every drop of the hydrazine rocket fuel is worth more than its weight in gold ... "The exact same physics, the wicking action, is responsible for positioning fuel inside the tank," Collicott said.

We are fascinated by the hybrid rocket engine which [Ben Krasnow] built and tested in his shop. It is actually using a hollow cylinder of acrylic as the fuel, with gaseous oxygen as an oxidizer.

is repackaged from the backend of Space Shuttle Orbiters into a more traditional inline rocket stage. SLS upsized the Shuttle elements — the big fuel tanks are now longer, and there are more ...