The Makeshift Rocket by Poul Anderson. When I'm at a proper computer I'll provide more details
https://www.sfgateway.com/titles/poul-anderson/the-makeshift-rocket/9780575109131/

Knud Axel Syrup, chief engineer of the spaceship Mercury Girl, sat and
drank his favourite beer and thought about the coming war he was so
anxious to avoid. For Grendel – the planetoid on which he was stranded
– had been occupied by a band of fiery Irish revolutionaries. And once
the rival Anglians discovered this, there response would be speedy and
violent.
Then, as Herr Syrup shook up a bottle of brew and let the foam shoot
out of its top, he realised suddenly what could be done to get him off
Grendel.
And so came about a marvellous spaceship – built of beer kegs, bound
by gunk, upholstered with pretzel boxes, and powered by the mighty
reaction forces of malted brew!
I wonder if the web site that @raindog308 was reading was "Project Rho"
http://www.projectrho.com/public_html/rocket/enginelist.php