D&D 5e:
AEthelwyn: Strain gauges haven't been invented yet, right?

AEthelwyn: I would like to buy a fireproof table frame with rails on top of it, high strength scales, ...
GM: Just tell me what you're planning
AEthelwyn: Flame test stand and instrumentation.

AEthelwyn: You said your tests usually end in conflagration. Is this because it can't be steered and crashes, it catches the pilots pants on fire, or fire comes out of somewhere it's not supposed to?
Gnomish Inventor: Yes.