THE AERONAUTS has been described as "GRAVITY meets FREE SOLO," and though I haven't seen the latter, this seems to be a reasonable comparison. There's drama, love and loss, realism and historical significance, female empowerment and the championing of the underdog archetype, and just straight-up adventure, which I found highly entertaining.
Limericks, as you likely know, are generally humorous, and the subject here is not. While this structure may seem like an odd choice for this poem, I think the rhythm and rhyme of it add to the tale, and perhaps the chaos of the main character's situation.
Although Courtney's been signed to Virgin/Capitol Records, he has the indie-alternative past to fuel good, original music.