Here's my BrickWorks Forum Group Build entry: Black Thunder.
It is kind of dome shaped, but that makes it really fast, and elegant too.
I know it isn't airtight, but it's strictly atmospheric, so it doesn't have to be.
This is sort of middle-upper class airspeeder, so it goes pretty fast, and looks pretty cool to boot.
It is named Black Thunder for the sound it's turbo-engine makes when it revvs up.