Do the Shuttle Carrier Aircraft count? The space shuttle is an aircraft with the flight characteristics of a svelte brick. It'll land just fine. It only lifted off in Cowboy Bebop. So to fly it from place to place, without taking the long way up, it'd piggy-back atop secondhand 747s. They didn't bother replacing the American Airlines livery for at least five years.
The mounts on top read "attach orbiter here - black side down."
I'm a doohickey anarchist: anything you think counts as a doohickey is a doohickey. The SCA is a doohickey.
Also lol that text on the mounts, didn't know about that – beyond the space nerd basics I don't know much about the details of the shuttle program (but ask me about the AGC irl and I turn into an unskippable cutscene.)