It is half-buried in the mud swamp right of the mill.
(see related questions)
The saucer Excalibur is crashed in the mud swamp to the right of the Mill.
The saucer Excalibur, one of the attacking craft, has crashed in the mud swamp to the right of the Mill.
The fuel rod powers the saucer Excalibur. The hovercraft runs on manure.
On the saucer Excalibur, you must enter coordinates before the ship will launch. (see related question)
When you get a replacement for it, it automatically snaps into place. (see the related question)
You will use the saucer Excalibur to reach space, then build a spaceship on the Pewter Moon. (see related questions for how)
The hovercraft will carry you over the mud swamp to reach the crashed saucer Excalibur. (see related question)
Reach and repair the saucer Excalibur in the mud swamp past the mill. (see related questions)
The crashed saucer Excalibur is in the mud swamp. To reach it, get the hovercraft from the attic of the mill. You will need to replace the fuel rod of the Excalibur, and there is another one powering the robot in the castle dungeon. (see related questions)
You can reach space by fixing the crashed saucer Excalibur, and get a new spaceship at the Pewter Moon. (see related questions)
The saucer Excalibur has crashed in the mud swamp. If you can replace its damaged green fuel rod, it can take you into space. (see related questions)
With the saucer Excalibur, you go to the Pewter Moon, and there you make a real spaceship to travel the solar system. (see related question)