Oh. I see. That’s what you get when the rate varies linearly with the height (or radius, as that varies linearly with height). But it really burns at a constant volume, which isn’t the same thing.
I didn’t feel like playing along, but I did get the first word right away.
I was thinking clues could include haggis, scotch, and poet/poetry, and luckily haggis was first. I clicked your spoiler without looking for others.