Young Charley Bullock grew up in the streets of Gotham City, and he was greatly impressed by the exploits of Gotham's most famous crime fighter, Batman. Bullock never met the Dark Knight, but he did come across another Justice Society member, Wildcat (Ted Grant). On that day, Ted was feeling a bit dejected because he felt he didn't get along with the younger members of the Justice Society. He wandered over to his old business, Grant's Gym (which he had closed when he rejoined the JSA).
Charlie's older brother had trained at Grant's gym and Bullock was disappointed to find it was closed. Just then, Wildcat was attacked by a gang. He defeated him with some unexpected help from Charley and decided to reveal his secret identity to the boy. This inspired Grant to train a new generation of heroes and he resigned from active duty in the JSA to reopened the gym. (Adventure Comics #464) NOTES: This story was originally intended for All-Star Comics #75. Charlie is drawn as a kid in this story but his next appearance (only three years later, below) depicts him as having just graduated from law school.
Charley went on to attend law school and was hired as a junior staff member to the law firm of Cranston,
Grayson and Wayne — as in Helena Wayne, aka the Huntress. (Wonder Woman vol. 1 #281–284) When a super-villain named Karnage attacked the law offices
in search of senior partner Arthur Cranston, Bullock rushed forward to oppose
the intruder, only to be swatted away like a fly. (#286–287) The incident changed Bullock, who was disappointed in his actions that day; he vowed to make some changes. (#289)
The next time he witnessed a crime, Charles considered it a call to arms. The following evening, he donned a mask and scalloped cape and took to the streets as a costumed crime fighter. He ran across the Huntress who was stopped by his costume's resemblance to the Batman's. His dark blue cape functioned
as a hang-glider. He declared himself Blackwing, but was once again grounded by one of the thugs. The would-be hero was beaten into unconsciousness
and unmasked. This was seen from a distance by the Huntress, who recognized Charles instantly.
(#297)
Blackwing was brought in to Boa, the mastermind behind the gang. The Huntress crashed in but was likewise incapactitated by a boa constrictor as the villains made their exit. Blackwing, who'd
been feigning unconsciousness, used a dagger to slash the serpent and free
the Huntress. (#298–299)
Afterward he explained to her that he wanted to be a symbol for everyday people in Gotham. Together he and the Huntress managed to capture the Boa and his gang that night, (#299) but Charles never took to the sky as Blackwing again.
Powers
Blackwing had no special powers. He was trained by Wildcat in hand-to-hand combat. He wore a special suit with a stocked-up utility belt, and a cape that functioned like glider wings.