B-36 with bomb drop. Use the three position switch to drop bombs.
Many thanks to Inky00 without whose pioneering work I would never have known how to make the bombs drop, and to Cowboy, for an awesome design.
Edit Feb. 09: Seems some people have been having trouble with the bombs not dropping. They work fine for me in G3.5.065, even re-downloading the file. If you have trouble, with 3.5.065, feel free to message me. The bombs probably will not work in any other version without changing the physics.