Deiselpunk is a.k.a./similar to Teslapunk or Raygun Gothic. Think steampunk only from pretty much going from the WWI to the WWII eras and the various gadgetry that entails. So include biplanes/airplanes, maybe early motorcycles and more advanced weaponry if that's your thing.See The Rocketeer and you've got a decent idea, although I prefer the twenties/silent film era myself.
Got me hanging. I mean, it's in reference I believe to diesel fuel. Check out wikipedia, there's an entry. It's sort of a neglected genre compared to steampunk lately. Sky Captain comes to mind, although I slept through most of that. Readers, anyone else here know some good dieselpunk genre movies and stories? I'm thinking maybe some fiction like "Neuromancer" is to Cyberpunk?