I’m looking for a short story or novella about some people on a space station, around Earth I think, which at the end of the story broke free of its orbit and headed off into open space. The central character was some sort of engineer, and played a guitar, and there was a recurrent song with a refrain of “I’ll get where I wasn’t going”. At the end, he created a verse that ended something like “If the slipstick slips on this ship of ours, we’ll get where I wasn’t going.” I'm not sure about the word slipstick – I believe it was a slang term for a slide rule, and slipstick is how I remember it.
In the 60s, this was published in Analog, and I think it was done as a series over a few issues, but I could be misremembering.