While Mordred's hovercraft runs on manure, the saucer is advanced technology. It has a green fuel rod that has been broken. You need to get a replacement fuel rod.
For the procedure, see the related question.
Setting the coordinates, you will find that none of the planets is in range. Go to the moon mentioned on Mordred's missing journal page, at X-56 Y-52.
When you build a new spaceship, there is a single-click launch button.
The saucer Excalibur will fly out of the mud once you have replaced its broken Fuel Rod and entered the proper coordinates on its computer dials.
The only coordinates that will work are X-56 Y-52, which are on the missing page from Mordred's Journal.
(see related questions)
The coordinates are X-56 Y-52 and you can enter them with the two dials once you have obtained a new Fuel Rod for the saucer.
(see related question)
x-56 y-52 it will get you to the moon. the moon is the only place you can go on the flying saucer
The saucer Excalibur is crashed in the mud swamp to the right of the Mill.
You get the replacement green FUEL ROD for the SAUCER Excalibur from the robot invader in the dungeon. (see related question)
Write down 56 52
The saucer Excalibur is crashed in the mud to the right of the old mill. It will need a replacement for its damaged fuel supply, the green fuel rod.
You can't fly like in Super Power Island. You need a fuel rod for the saucer, and then you can get a new spaceship on the moon.
When you get a new fuel rod, just place it in the spot on the saucer and it will lock in. (see related question)
The leaky green stuff is a broken Fuel Rod that powers the saucer. You will need a new one. (see related question)
It is half-buried in the mud swamp right of the mill. (see related questions)
You must enter the Astrozone building and swap your saucer for a new ship, which you build on the Holopad.
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.