Everyone knows about the SR-71 Blackbird spy plane, with its beyond-insane performance and alien-technology appearance, but not a lot of thought goes into the mundane question of how you start the engines on the thing. Enter the AG-330 Start Cart! Packing a pair of torquegasmic Buick 401 nailheads, the AG-330 had a vertical shaft that was inserted into the starter mechanism on the underside of the Blackbird. No mufflers, of course- it's an insult to a Mach 3 aircraft to use mufflers on its start cart!

AG-330 SR-71 Start Carts [wvi.com]

Old Yeller II: Best Doggone Buick In The West [internal]