Robert A. Joy, 45, one of three persons killed in the Friday crash of a helicopter in the Washington Channel near the 14th Street Bridge, was a former Peace Corps official who had owned and operated the Red Balloon toy store in Georgetown since 1972.

Mr. Joy was accompanying a friend, free-lance photographer William S. Weems, who was taking pictures for a Baltimore advertising firm and Sumner Realty.

Only the helicopter pilot, Jack C. Turley, 37, survived the crash. Witnesses said the helicopter appeared to lose power while hovering over the water. The crash is under investigation by authorities.

Mr. Joy, who lived in Washington, was a native of Boston. He was a 1964 graduate of Boston University and earned a master's degree in journalism at Ohio University.

He was a Peace Corps volunteer in Venezuela from 1964 to 1966. After graduate school, he came to Washington. From 1967 to 1972, he was a Peace Corps field agent.

Mr. Joy had played amateur ice hockey with area groups and had been a volunteer softball and basketball coach at the Waldorf School in Washington.

Survivors include his wife, Linda L., and two daughters, Tatum and Brenna Joy, all of Washington; his parents, Arthur and Elizabeth Joy of South Wellfleet, Mass., and Orange City, Fla.; and two sisters, Phyllis Naples of Arlington and Pamela Joy of Boston.

VICTORIA NOYES HINCKLEY, 24, one of three persons killed in the Friday crash of a helicopter in the Washington Channel near the 14th Street Bridge, had been an administrative assistant with Sumner Realty in Washington since earlier this summer.

She was aboard the helicopter as part of her work on the production of an ad brochure. Sumner and a Baltimore advertising firm had chartered the helicopter for a picture-taking assignment.

Miss Hinckley, who lived in Alexandria, was born in Washington and grew up in Rockville. She was a graduate of the Oldfield School in Glencoe, Md., and was a 1985 graduate of Mary Baldwin College in Staunton, Va. Before joining Sumner, she had spent about a year as an administrative assistant with Overseas Marketing Inc. in Leesburg.

She was a member of Christ Episcopal Church in Rockville.

Survivors include her parents, Dr. Robert F. and Joan P. Hinckley of Rockville; a brother, William P. Hinckley of London, England, and a sister, Susan H. Adams of Gaithersburg.