The maximum speed of the F-4 Phantom II was 1,485 miles per hour at 48,000 feet. This bird was not to be toyed with. She carried with her into battle a 20 mm M61 Vulcan Gatling cannon with 640 rounds.

F-4 Phantom II: The Legendary Fighter Jet That ... The military therefore chose to upgrade these birds to include 20 mm M61 Vulcan cannons, believing they needed reliable close-in dogfighting ...

Here’s What You Need to Remember: While this might seem like cutting edge twenty-first-century technology, the original M61 was developed after World War II by General Electric and first ...